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17879840
quant-ph/9712011
1997-12-03
Quantum computers can search rapidly by using almost any transformation
A quantum computer has a clear advantage over a classical computer for exhaustive search. The quantum mechanical algorithm for exhaustive search was originally derived by using subtle properties of a particular quantum mechanical operation called the Walsh-Hadamard (W-H) transform. This paper shows that this algorithm ...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10309917
astro-ph/9712050
1997-12-03
On the Evolution of Damped Lyman Alpha Systems to Galactic Disks
The mean metallicity of the thick disk of the Galaxy is 0.5 dex higher than that of the damped Lyman alpha systems. This has been interpreted to argue that stars in the former do not arise out of gas in the latter. Using new metallicity and H I column-density data we show the metal-rich damped systems do contain suffic...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14819081
astro-ph/9712057
1997-12-04
Weighing Neutrinos with Galaxy Surveys
We show that galaxy redshift surveys sensitively probe the neutrino mass, with eV mass neutrinos suppressing power by a factor of two. The Sloan Digital Sky Survey can potentially detect $N$ nearly degenerate massive neutrino species with mass m_nu > 0.65 (Omega_m h^2/0.1 N)^{0.8} eV at better than 2sigma once microwav...
[ "astro-ph", "hep-ph", "nucl-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14585375
cond-mat/9712058
1997-12-04
Interatomic Potential for Silicon Defects and Disordered Phases
We develop an empirical potential for silicon which represents a considerable improvement over existing models in describing local bonding for bulk defects and disordered phases. The model consists of two- and three-body interactions with theoretically motivated functional forms that capture chemical and physical trend...
[ "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j justo_1", "name": "João [\"Francisco\"] Justo", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m bazant_1", "name": "Martin [\"Z.\"] Bazant", "publication_history": null, "h_index": null, "n...
null
119363785
cond-mat/9712067
1997-12-05
Effective Potential, Mori Product and Quantum Dynamics
We present a method that permits the calculation of the dynamical correlation functions for quantum systems. These are obtained by evaluating the generating functionals of the static moments of the relaxation functions in a self-consistent approximation that can be obtained by an appropriate extension of the effective ...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a cuccoli_1", "name": "Alessandro Cuccoli", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r giachetti_1", "name": "R. Giachetti", "publication_history": null, "h_index": null, "num_papers": n...
null
1303847
hep-ph/9712279
1997-12-05
Dipenguin-like contributions to D0 - anti-D0 mixing
We show that because of the milder GIM suppression, the four-quark dipenguin operator contributes to the short distance piece of the D^0-\bar D^0 mixing amplitude at the same order of magnitude as the box diagram. In addition, we put an upper bound \Delta m_D^{LDR} \leq 5 \times \Delta m_D^{box} on a long-distance reso...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119441250
cond-mat/9712063
1997-12-05
Properties of a classical spin liquid: the Heisenberg pyrochlore antiferromagnet
We study the low-temperature behaviour of the classical Heisenberg antiferromagnet with nearest neighbour interactions on the pyrochlore lattice. Because of geometrical frustration, the ground state of this model has an extensive number of degrees of freedom. We show, by analysing the effects of small fluctuations arou...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
23409747
cond-mat/9712114
1997-12-10
Dynamics of Viscoplastic Deformation in Amorphous Solids
We propose a dynamical theory of low-temperature shear deformation in amorphous solids. Our analysis is based on molecular-dynamics simulations of a two-dimensional, two-component noncrystalline system. These numerical simulations reveal behavior typical of metallic glasses and other viscoplastic materials, specificall...
[ "cond-mat.stat-mech", "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119394535
hep-ex/9712013
1997-12-10
Search for Supersymmetry with a dominant R-Parity violating LLE Coupling in e+e- Collisions at centre-of-mass energies of 130 to 172 GeV
A search for pair-production of supersymmetric particles under the assumption that R-parity is violated via a dominant LLE coupling has been performed using the data collected by ALEPH at centre-of-mass energies of 130-172 GeV. The observed candidate events in the data are in agreement with the Standard Model expectati...
[ "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
39858698
quant-ph/9712027
1997-12-11
Quantum communication and the creation of maximally entangled pairs of atoms over a noisy channel
We show how to create maximally entangled EPR pairs between spatially distant atoms, each of them inside a high-Q optical cavity, by sending photons through a general, noisy channel, such as a standard optical fiber. An error correction scheme that uses few auxiliary atoms in each cavity effectively eliminates photoabs...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "119403470", "num_citations": null }, { "corpus_id": "39944589", "num_citations": null }, { "corpus_id": "109959739", "num_citations": null } ]
[ { "author_id": "h briegel_1", "name": "Hans [\"J.\"] Briegel", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "w dür_1", "name": "Wolfgang Dür", "publication_history": null, "h_index": null, "num_papers": null...
null
31356384
chao-dyn/9712011
1997-12-12
Chaotic dynamics, fluctuations, nonequilibrium ensembles
A review of some recent results and ideas about the expected behaviour of large chaotic systems and fluids.
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16142557
astro-ph/9712195
1997-12-15
Interferometric Observation of Cosmic Microwave Background Anisotropies
We present a formalism for analyzing interferometric observations of Cosmic Microwave Background (CMB) anisotropy and polarization data. The formalism is based upon the ell-space expansion of the angular power spectrum favoured in recent years. Explicit discussions of maximum likelihood analysis, power spectrum reconst...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
73547266
alg-geom/9712016
1997-12-15
Invariance of Plurigenera
The following conjecture on the deformation invariance of plurigenera is proved. For a smooth projective holomorphic family of compact complex manifolds over the open unit 1-disk such that all the fibers are of general type, every plurigenus of the fiber is independent of the fiber. The proof uses Nadel's multiplier id...
[ "alg-geom", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16881098
cond-mat/9712154
1997-12-15
Collective motion of self-propelled particles: kinetic phase transition in one dimension
We demonstrate that a system of self-propelled particles (SPP) exhibits spontaneous symmetry breaking and self-organization in one dimension, in contrast with previous analytical predictions. To explain this surprising result we derive a new continuum theory that can account for the development of the symmetry broken s...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14228947
astro-ph/9712199
1997-12-16
Cosmological Neutrino Background Revisited
We solve the Boltzmann equation for cosmological neutrinos around the epoch of the electron-positron annihilation in order to verify the freeze-out approximation and to compute accurately the cosmological neutrino distribution function. We find the radiation energy density to be about 0.3% higher than the one predicted...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17236046
astro-ph/9712200
1997-12-16
HOP: A New Group-Finding Algorithm for N-body Simulations
We describe a new method (HOP) for identifying groups of particles in N-body simulations. Having assigned to every particle an estimate of its local density, we associate each particle with the densest of the N_hop particles nearest to it. Repeating this process allows us to trace a path, within the particle set itself...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17323152
astro-ph/9712213
1997-12-16
The Global Schmidt Law in Star Forming Galaxies
Measurements of H-alpha, HI, and CO distributions in 61 normal spiral galaxies are combined with published far-infrared and CO observations of 36 infrared-selected starburst galaxies, in order to study the form of the global star formation law, over the full range of gas densities and star formation rates (SFRs) observ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14423413
quant-ph/9712034
1997-12-17
Multi-access channels in quantum information theory
The multi-access channels in quantum information theory are considered. Classical messages from independent sources, which are represented as some quantum states, are transported by a channel to one address. The messages can interact with each other and with external environment. After statement of problem and proving ...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a allahverdyan_1", "name": "Armen [\"E.\"] Allahverdyan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d saakian_1", "name": "David [\"B.\"] Saakian", "publication_history": null, "h_index": nul...
null
15999131
astro-ph/9712216
1997-12-17
Optical-IR Spectral Energy Distributions of z>2 Lyman Break Galaxies
Broadband optical and IR spectral energy distributions are determined for spectroscopically confirmed z>2 Lyman break objects in the Hubble Deep Field (HDF). These photometric data are compared to spectral synthesis models which take into account the effects of metallicity and of internal reddening due to dust. It is f...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18281749
hep-ph/9712412
1997-12-17
Scalar Top Quark Production at $\mu^+ \mu^-$ Colliders
We discuss the production of stops at a $\mu^+ \mu^-$ collider. We present numerical predictions for the cross sections within the Minimal Supersymmetric Standard Model. In particular we consider stop production near $\sqrt{s} = m_{H^0}$ and $\sqrt{s} = m_{A^0}$.
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a bartl_1", "name": "Alfred Bartl", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h eberl_1", "name": "Helmut Eberl", "publication_history": null, "h_index": null, "num_papers": null, "nu...
null
17456096
q-alg/9712042
1997-12-17
Tensor product representations of the quantum double of a compact group
We consider the quantum double D(G) of a compact group G, following an earlier paper. We use the explicit comultiplication on D(G) in order to build tensor products of irreducible *-representations. Then we study their behaviour under the action of the R-matrix, and their decomposition into irreducible *-representation...
[ "q-alg", "hep-th", "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11809074
hep-ph/9712426
1997-12-17
Flavor Changing Neutral Currents at mu^+mu^- Colliders
We illustrate the possibility of observing signals from Flavor Changing Neutral Currents, originating from the scalar sector of a Two Higgs Doublet Model. In particular, we focus on the tree level process mu^+ mu^- --> tbar c + cbar t, via scalar exchange in the s-channel, as a distinctive process for mu^+ mu^- collide...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6536530
quant-ph/9712042
1997-12-18
Cryptographic Distinguishability Measures for Quantum Mechanical States
This paper, mostly expository in nature, surveys four measures of distinguishability for quantum-mechanical states. This is done from the point of view of the cryptographer with a particular eye on applications in quantum cryptography. Each of the measures considered is rooted in an analogous classical measure of disti...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17306179
q-alg/9712046
1997-12-19
Web bases for sl(3) are not dual canonical
We compare two natural bases for the invariant space of a tensor product of irreducible representations of A_2, or sl(3). One basis is the web basis, defined from a skein theory called the combinatorial A_2 spider. The other basis is the dual canonical basis, the dual of the basis defined by Lusztig and Kashiwara. For ...
[ "q-alg", "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15582577
astro-ph/9712287
1997-12-21
A method for optimal image subtraction
We present a new method designed for optimal subtraction of two images with different seeing. Using image subtraction appears to be essential for the full analysis of the microlensing survey images, however a perfect subtraction of two images is not easy as it requires the derivation of an extremely accurate convolutio...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
27333739
hep-ex/9712029
1997-12-22
A Measurement of the W Boson Mass
We present a measurement of the W boson mass using data collected by the D0 experiment at the Fermilab Tevatron during 1994--1995. We identify W bosons by their decays to $e\nu$ final states. We extract the W mass, M(W), by fitting the transverse mass and transverse electron momentum spectra from a sample of 28,323 W t...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b abbott_2", "name": "B. Abbott", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m abolins_1", "name": "Maris [\"A.\"] Abolins", "publication_history": null, "h_index": null, "num_papers": nul...
null
18195243
physics/9712050
1997-12-28
Odd Viscosity
When time reversal is broken the viscosity tensor can have a non vanishing odd part. In two dimensions, and only then, such odd viscosity is compatible with isotropy. Elementary and basic features of odd viscosity are examined by considering solutions of the wave and Navier-Stokes equations for hypothetical fluids wher...
[ "physics.flu-dyn" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
49228133
cond-mat/9712316
1997-12-30
Charged domain walls as quantum strings living on a lattice
A generic lattice cut-off model is introduced describing the quantum meandering of a single cuprate stripe. The fixed point dynamics is derived, showing besides free string behavior a variety of partially quantum disordered phases, bearing relationships both with quantum spin-chains and surface statistical physics.
[ "cond-mat.str-el", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16626418
cond-mat/9712318
1997-12-30
Herd behavior and aggregate fluctuations in financial markets
We present a simple model of a stock market where a random communication structure between agents gives rise to a heavy tails in the distribution of stock price variations in the form of an exponentially truncated power-law, similar to distributions observed in recent empirical studies of high frequency market data. Ou...
[ "cond-mat.stat-mech", "adap-org", "cond-mat.dis-nn", "nlin.AO", "q-fin.ST" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15840687
math/9801009
1998-01-02
Mobius functions of lattices
We introduce the concept of a bounded below set in a lattice. This can be used to give a generalization of Rota's broken circuit theorem to any finite lattice. We then show how this result can be used to compute and combinatorially explain the M\"obius function in various examples including non-crossing set partitions,...
[ "math.CO" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a blass_1", "name": "Andreas Blass", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b sagan_1", "name": "Bruce [\"E.\"] Sagan", "publication_history": null, "h_index": null, "num_papers": null...
null
13875248
math/9801008
1998-01-02
Characteristic and Ehrhart polynomials
Let A be a subspace arrangement and let chi(A,t) be the characteristic polynomial of its intersection lattice L(A). We show that if the subspaces in A are taken from L(B_n), where B_n is the type B Weyl arrangement, then chi(A,t) counts a certain set of lattice points. One can use this result to study the partial facto...
[ "math.CO" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a blass_1", "name": "Andreas Blass", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b sagan_1", "name": "Bruce [\"E.\"] Sagan", "publication_history": null, "h_index": null, "num_papers": null...
null
15448492
math/9801006
1998-01-02
Three constructions of Frobenius manifolds: a comparative study
The paper studies three classes of Frobenius manifolds: Quantum Cohomology (topological sigma-models), unfolding spaces of singularities (K. Saito's theory, Landau-Ginzburg models), and the recent Barannikov-Kontsevich construction starting with the Dolbeault complex of a Calabi-Yau manifold and conjecturally producing...
[ "math.QA", "math.AG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17741429
hep-ph/9801225
1998-01-06
Gluon interference effects in t-tbar production at the Next Linear Collider
We study the effects of gluon interference in the production and semi-leptonic decay of a t-tbar pair above threshold at the Next Linear Collider (NLC). We calculate all matrix elements to next-to-leading order and use the resulting expressions for the development of a Monte Carlo event generator. Our results show effe...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g siopsis_1", "name": "George Siopsis", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
18741862
cond-mat/9801067
1998-01-08
Dynamics of Bose condensed gases in highly deformed traps
We provide a unified investigation of normal modes and sound propagation at zero temperature in Bose condensed gases confined in highly asymmetric harmonic traps and interacting with repulsive forces. By using hydrodynamic theory for superfluids we obtain explicit analytic results for the dispersion law of the low ener...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14722814
math/9801145
1998-01-09
Smoluchowski's coagulation equation: uniqueness, non-uniqueness and a hydrodynamic limit for the stochastic coalescent
Sufficient conditions are given for existence and uniqueness in Smoluchowski's coagulation equation, for a wide class of coagulation kernels and initial mass distributions. An example of non-uniqueness is constructed. The stochastic coalescent is shown to converge weakly to the solution of Smoluchowski's equation.
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18033154
astro-ph/9801082
1998-01-11
The Effects of Correlations on Neutrino Opacities in Nuclear Matter
Including nucleon-nucleon correlations due to both Fermi statistics and nuclear forces, we have developed a general formalism for calculating the neutral-current neutrino-nucleon opacities in nuclear matter. We derive corrections to the dynamic structure factors due to both density and spin correlations and find that n...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
42100478
astro-ph/0012376
1998-01-12
Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
We present here the final results of the Hubble Space Telescope Key Project to measure the Hubble constant. We summarize our method, the results and the uncertainties, tabulate our revised distances, and give the implications of these results for cosmology. The analysis presented here benefits from a number of recent i...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14077176
cond-mat/9801102
1998-01-12
A fast algorithm for backbones
A matching algorithm for the identification of backbones in percolation problems is introduced. Using this procedure, percolation backbones are studied in two- to five-dimensional systems containing 1.7x10^7 sites, two orders of magnitude larger than was previously possible using burning algorithms.
[ "cond-mat.stat-mech", "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119095634
hep-th/9801061
1998-01-12
Testing Seiberg-Witten Solution
We propose a few tests of Seiberg-Witten solutions of $\mathcal{N}=2$ supersymmetric gauge theories by the instanton calculus in twisted gauge theories. We re-examine the low-energy effective abelian theory in the presence of sources and present the formalism which makes duality transformations transparent and easily f...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8944071
quant-ph/9801022
1998-01-12
Security of Quantum Key Distribution Against All Collective Attacks
Security of quantum key distribution against sophisticated attacks is among the most important issues in quantum information theory. In this work we prove security against a very important class of attacks called collective attacks (under a compatible noise model) which use quantum memories and gates, and which are dir...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18652623
gr-qc/9801036
1998-01-12
A small guide to variations in teleparallel gauge theories of gravity and the Kaniel-Itin model
Recently Kaniel & Itin proposed a gravitational model with the wave type equation [\square+\lambda(x)]\vartheta^\alpha=0 as vacuum field equation, where \vartheta^\alpha denotes the coframe of spacetime. They found that the viable Yilmaz-Rosen metric is an exact solution of the tracefree part of their field equation. T...
[ "gr-qc", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
163598
chao-dyn/9801015
1998-01-13
The Euler-Poincare Equations and Semidirect Products with Applications to Continuum Theories
We study Euler-Poincare systems (i.e., the Lagrangian analogue of Lie-Poisson Hamiltonian systems) defined on semidirect product Lie algebras. We first give a derivation of the Euler-Poincare equations for a parameter dependent Lagrangian by using a variational principle of Lagrange d'Alembert type. Then we derive an a...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17484953
astro-ph/9801141
1998-01-14
Type Ia supernova counts at high z: signatures of cosmological models and progenitors
Determination of the rates at which supernovae of Type Ia (SNe Ia) occur in the early Universe can give signatures of the time spent by the binary progenitor systems to reach explosion and of the geometry of the Universe. Observations made within the Supernova Cosmology Project are already providing the first numbers. ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14149063
physics/9801019
1998-01-16
Momentum Maps and Classical Relativistic Fields. Part I: Covariant Field Theory
This is the first paper of a five part work in which we study the Lagrangian and Hamiltonian structure of classical field theories with constraints. Our goal is to explore some of the connections between initial value constraints and gauge transformations in such theories (either relativistic or not). To do this, in th...
[ "math-ph", "gr-qc", "hep-th", "math.MP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14266495
astro-ph/9801168
1998-01-16
Quasi-Periodic Occultation by a Precessing Accretion Disk and Other Variabilities of SMC X-1
We have investigated the variability of the binary X-ray pulsar, SMC X-1, in data from several X-ray observatories. We confirm the ~60-day cyclic variation of the X-ray flux in the long-term monitoring data from the RXTE and CGRO observatories. X-ray light curves and spectra from the ROSAT, Ginga, and ASCA observatorie...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17577535
hep-ph/9801329
1998-01-16
Signals of a superlight gravitino at hadron colliders when the other superparticles are heavy
If the gravitino (G) is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state. We compute here the cross-sections for some distinctive signals at hadron colliders: p...
[ "hep-ph", "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119418822
hep-ph/9801339
1998-01-19
A Test of $\numunux$ Oscillations and determination of the $\Delta m^2$ parameter of Atmospheric Neutrinos using the $L/E$ method
We point out that the measurement of the $L/E$ distribution of atmospheric neutrino events with sufficient resolution in order to observe the characteristic modulations of neutrino oscillations would provide a unique way to test the $\numunux$ oscillations nature of the atmospheric neutrino anomaly in the parameter ran...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g mannocchi_1", "name": "Giampaolo Mannocchi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l periale_1", "name": "Luciano Periale", "publication_history": null, "h_index": null, "num_papers...
null
17084607
astro-ph/9801192
1998-01-20
Dark Matter Halos within Clusters
We examine the properties of dark matter halos within a rich galaxy cluster using a high resolution simulation that captures the cosmological context of a cold dark matter universe. The mass and force resolution permit the resolution of 150 halos with circular velocities larger than 80 kms within the cluster's virial r...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118852285
hep-lat/9801023
1998-01-20
SYM on the lattice
Non-perturbative predictions and numerical simulations in supersymmetric Yang-Mills (SYM) theories are reviewed.
[ "hep-lat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10661051
gr-qc/9801069
1998-01-20
Stable characteristic evolution of generic 3-dimensional single-black-hole spacetimes
We report new results which establish that the accurate 3-dimensional numerical simulation of generic single-black-hole spacetimes has been achieved by characteristic evolution with unlimited long term stability. Our results cover a selection of distorted, moving and spinning single black holes, with evolution times up...
[ "gr-qc" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r gómez_1", "name": "Roberto Gómez", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l lehner_1", "name": "Luis Lehner", "publication_history": null, "h_index": null, "num_papers": null, "n...
null
1985254
hep-lat/9801027
1998-01-21
Detection of Center Vortices in the Lattice Yang-Mills Vacuum
We discuss the implementation of the ``direct'' maximal center gauge (a gauge which maximizes the lattice average of the squared-modulus of the trace of link variables), and its use in identifying Z(2) center vortices in Yang-Mills vacuum configurations generated by lattice Monte Carlo. We find that center vortices ide...
[ "hep-lat", "hep-ph", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l debbio_1", "name": "Luigi [\"Del\"] Debbio", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m faber_1", "name": "Manfried Faber", "publication_history": null, "h_index": null, "num_papers": ...
null
7536820
astro-ph/9801237
1998-01-24
Starburst-driven Mass Loss from Dwarf Galaxies: Efficiency and Metal Ejection
We model the effects of repeated supernova explosions from starbursts in dwarf galaxies on the interstellar medium of these galaxies, taking into account the gravitational potential of their dominant dark matter haloes. We explore supernova rates from one every 30,000 yr to one every 3 million yr, equivalent to steady ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118928837
hep-th/9801166
1998-01-25
Domain Walls in MQCD and Monge-Ampere Equation
We study Witten's proposal that a domain wall exists in M-theory fivebrane version of QCD (MQCD) and that it can be represented as a supersymmetric three-cycle in G_2 holonomy manifold. It is shown that equations defining the U(1) invariant domain wall for SU(2) group can be reduced to the Monge-Ampere equation. A proo...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17034731
astro-ph/9801251
1998-01-26
RXTE Absolute Timing Results for the Pulsars B1821-24 and B1509-58
Observations with the Rossi X-ray Timing Explorer and the Jodrell Bank, Parkes, and Green Bank telescopes have enabled us to determine the time delay between radio and X-ray pulses in the two isolated pulsars B1821-24 and B1509-58. For the former we find that the narrow X-ray and radio pulse components are close to bei...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119348111
cond-mat/9801274
1998-01-27
Energetics of Domain Walls in the 2D t-J model
Using the density matrix renormalization group, we calculate the energy of a domain wall in the 2D t-J model as a function of the linear hole density \rho_\ell, as well as the interaction energy between walls, for J/t=0.35. Based on these results, we conclude that the ground state always has domain walls for dopings 0 ...
[ "cond-mat.str-el", "cond-mat.supr-con" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12341263
astro-ph/9801267
1998-01-27
Primordial Non-Gaussianity: Baryon Bias and Gravitational Collapse of Cosmic String Wakes
I compute the 3-D non-linear evolution of gas and dark matter fluids in the neighbourhood of cosmic string wakes which are formed at high redshift ($z\simeq 2240$) for a ``realistic'' scenario of wake formation. These wakes are the ones which stand out most prominently as cosmological sheets and are expected to play a ...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "12228982", "num_citations": null }, { "corpus_id": "3187184", "num_citations": null } ]
[ { "author_id": "b wandelt_1", "name": "Benjamin [\"D.\"] Wandelt", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
381936
cond-mat/9801279
1998-01-27
A Langevin Approach to Stock Market Fluctuations and Crashes
We propose a non linear Langevin equation as a model for stock market fluctuations and crashes. This equation is based on an identification of the different processes influencing the demand and supply, and their mathematical transcription. We emphasize the importance of feedback effects of price variations onto themsel...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17613142
hep-ph/9801437
1998-01-29
Limits on the mass of the lightest Higgs in supersymmetric models
In supersymmetric models extended with a gauge singlet the mass of the lightest Higgs boson has contributions proportional to the adimensional coupling $\lambda$. In minimal scenarios, the requirement that this coupling remains perturbative up to the unification scale constrains $\lambda$ to be smaller than $\approx 0....
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14129596
physics/9801033
1998-01-30
A 10 MHz beam counter and a multiplicity detector for the E864 spectrometer
The E864 experiment at BNL requires a beam counter and multiplicity detector system that can perform at an incident beam rate of 10^7 Au ions per second. We have developed and tested a 150 micrometer thick quartz Cherenkov beam counter and a scintillator based multiplicity-trigger counter during the first run of this e...
[ "physics.ins-det" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "p haridas_1", "name": "Puthiya [\"Veetil\"] Haridas", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "i pless_1", "name": "Irwin [\"A.\"] Pless", "publication_history": null, "h_index": null, "...
null
119350184
gr-qc/9801110
1998-01-30
Stable 3-level leapfrog integration in numerical relativity
The 3-level leapfrog time integration algorithm is an attractive choice for numerical relativity simulations since it is time-symmetric and avoids non-physical damping. In Newtonian problems without velocity dependent forces, this method enjoys the advantage of long term stability. However, for more general differentia...
[ "gr-qc", "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18088444
solv-int/9802004
1998-01-31
Computation of Higher-order Symmetries for Nonlinear Evolution and Lattice Equations
A straightforward algorithm for the symbolic computation of higher-order symmetries of nonlinear evolution equations and lattice equations is presented. The scaling properties of the evolution or lattice equations are used to determine the polynomial form of the higher-order symmetries. The coefficients of the symmetry...
[ "solv-int", "nlin.SI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15035181
hep-th/9802012
1998-02-03
Instantons and Magnetic Monopoles on $R^3\times S^1$ with Arbitrary Simple Gauge Groups
We investigate Yang-Mills theories with arbitrary gauge group on $R^3\times S^1$, whose symmetry is spontaneously broken by the Wilson loop. We show that instantons are made of fundamental magnetic monopoles, each of which has a corresponding root in the extended Dynkin diagram. The number of constituent magnetic monop...
[ "hep-th", "hep-lat", "hep-ph", "nucl-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14273497
hep-lat/9802003
1998-02-05
Center dominance, Casimir scaling, and confinement in lattice gauge theory
We present numerical evidence that supports the theory of quark confinement based on center vortex condensation. We introduce a special gauge ("maximal center gauge") and center projection, suitable for identification of center vortices. Main focus is then put on the connection of vortices in center projection to "conf...
[ "hep-lat", "hep-ph", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l debbio_1", "name": "Luigi [\"Del\"] Debbio", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m faber_1", "name": "Manfried Faber", "publication_history": null, "h_index": null, "num_papers": ...
null
16130945
solv-int/9802008
1998-02-06
A systematic construction of completely integrable Hamiltonians from coalgebras
A universal algorithm to construct N-particle (classical and quantum) completely integrable Hamiltonian systems from representations of coalgebras with Casimir element is presented. In particular, this construction shows that quantum deformations can be interpreted as generating structures for integrable deformations o...
[ "solv-int", "nlin.SI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11662810
quant-ph/9802018
1998-02-06
Experimental Quantum Error Correction
Quantum error correction is required to compensate for the fragility of the state of a quantum computer. We report the first experimental implementations of quantum error correction and confirm the expected state stabilization. In NMR computing, however, a net improvement in the signal-to-noise would require very high ...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1468520
hep-th/9802042
1998-02-07
Supergravity and The Large N Limit of Theories With Sixteen Supercharges
We consider field theories with sixteen supersymmetries, which includes U(N) Yang-Mills theories in various dimensions, and argue that their large N limit is related to certain supergravity solutions. We study this by considering a system of D-branes in string theory and then taking a limit where the brane worldvolume ...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16735020
quant-ph/9802025
1998-02-10
Unconditional security in Quantum Cryptography
Basic techniques to prove the unconditional security of quantum cryptography are described. They are applied to a quantum key distribution protocol proposed by Bennett and Brassard in 1984. The proof considers a practical variation on the protocol in which the channel is noisy and photons may be lost during the transmi...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15965017
hep-ph/9802290
1998-02-10
BFKL pomeron in the next-to-leading approximation
We find one-loop correction to the integral kernel of the BFKL equation for the total cross section of the high energy scattering in QCD and calculate the next-to-leading contribution to anomalous dimensions of twist-2 operators near $j=1$.
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18572497
hep-lat/9802015
1998-02-11
Maximal variance reduction for stochastic propagators with applications to the static quark spectrum
We study a new method -- maximal variance reduction -- for reducing the variance of stochastic estimators for quark propagators. We find that while this method is comparable to usual iterative inversion for light-light mesons, a considerable improvement is achieved for systems containing at least one infinitely heavy q...
[ "hep-lat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118931256
quant-ph/9802037
1998-02-12
On the Power of One Bit of Quantum Information
In standard quantum computation, the initial state is pure and the answer is determined by making a measurement of some of the bits in the computational basis. What can be accomplished if the initial state is a highly mixed state and the answer is determined by measuring the expectation of $\sigma_z$ on the first bit w...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
715000
hep-ph/9802304
1998-02-12
Ultra-High Energy Cosmic Rays, Superheavy Long-Living Particles, and Matter Creation after Inflation
The highest energy cosmic rays, above the Greisen-Zatsepin-Kuzmin cut-off of cosmic ray spectrum, may be produced in decays of superheavy long-living X-particles. We conjecture that these particles may be produced naturally in the early Universe from vacuum fluctuations during inflation and may constitute a considerabl...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1078168
quant-ph/9802049
1998-02-18
Quantum Lower Bounds by Polynomials
We examine the number T of queries that a quantum network requires to compute several Boolean functions on {0,1}^N in the black-box model. We show that, in the black-box model, the exponential quantum speed-up obtained for partial functions (i.e. problems involving a promise on the input) by Deutsch and Jozsa and by Si...
[ "quant-ph", "cs.CC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9901755
q-bio/0309024
1998-02-18
Synchronization and oscillatory dynamics in heterogeneous mutually inhibited neurons
We study some mechanisms responsible for synchronous oscillations and loss of synchrony at physiologically relevant frequencies (10-200 Hz) in a network of heterogeneous inhibitory neurons. We focus on the factors that determine the level of synchrony and frequency of the network response, as well as the effects of mil...
[ "q-bio.NC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
84500401
quant-ph/9802053
1998-02-19
Some remarks on the fragmentation of Bose condensates
We show how fragmentation of a Bose-Einstein condensate can occur given repulsive inter-particle interactions and a non-uniform external potential.
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r spekkens_1", "name": "Robert [\"W.\"] Spekkens", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j sipe_1", "name": "John [\"E.\"] Sipe", "publication_history": null, "h_index": null, "num_pa...
null
119337135
astro-ph/9802256
1998-02-19
The Astronomer's Telegram: A Web-based Short-Notice Publication System for the Professional Astronomical Community
The Astronomer's Telegram (ATEL; http://fire.berkeley.edu:8080/) is a web based short-notice (<4000 characters) publication system for reporting and commenting on new astronomical observations, offering for the first time in astronomy effectively instantaneous distribution of time-critical information for the entire pr...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10882387
hep-th/9802150
1998-02-20
Anti De Sitter Space And Holography
Recently, it has been proposed by Maldacena that large $N$ limits of certain conformal field theories in $d$ dimensions can be described in terms of supergravity (and string theory) on the product of $d+1$-dimensional $AdS$ space with a compact manifold. Here we elaborate on this idea and propose a precise corresponden...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15848181
astro-ph/9802299
1998-02-23
The Spectrum of the Brown Dwarf Gliese 229B
We present a spectrum of the cool (T_eff = 900 K) brown dwarf Gliese 229B. This spectrum, with a relatively high signal-to-noise ratio per spectral resolution element (> 30), spans the wavelength range from 0.837 microns to 5.0 microns. We identify a total of four different major methane absorption features, including ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119019839
cond-mat/9802249
1998-02-24
Microscopic analysis of Clausius-Duhem processes
Given a thermodynamic process which carries a system from one equilibrium state to another, we construct a quantity whose average, over an ensemble of microscopic realizations of the process, depends only on these end states, even if at intermediate times the system is out of equilibrium. This result: (1) can be used t...
[ "cond-mat.stat-mech", "physics.chem-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3263242
quant-ph/9802062
1998-02-24
1-way quantum finite automata: strengths, weaknesses and generalizations
We study 1-way quantum finite automata (QFAs). First, we compare them with their classical counterparts. We show that, if an automaton is required to give the correct answer with a large probability (over 0.98), then the power of 1-way QFAs is equal to the power of 1-way reversible automata. However, quantum automata g...
[ "quant-ph", "cs.CC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1586352
quant-ph/9802061
1998-02-24
Enlargement of Calderbank Shor Steane quantum codes
It is shown that a classical error correcting code C = [n,k,d] which contains its dual, C^{\perp} \subseteq C, and which can be enlarged to C' = [n,k' > k+1, d'], can be converted into a quantum code of parameters [[ n, k+k' - n, min(d, 3d'/2) ]]. This is a generalisation of a previous construction, it enables many new...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16976422
cond-mat/9802256
1998-02-24
Hierarchical Structure in Financial Markets
I find a topological arrangement of stocks traded in a financial market which has associated a meaningful economic taxonomy. The topological space is a graph connecting the stocks of the portfolio analyzed. The graph is obtained starting from the matrix of correlation coefficient computed between all pairs of stocks of...
[ "cond-mat.stat-mech", "cond-mat.dis-nn", "q-fin.ST" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
15775979
astro-ph/9802322
1998-02-25
The ESO Imaging Survey: Status Report and Preliminary Results
The ESO Imaging Survey (EIS) presented in early issues of the Messenger, and with up-to-date information on the ongoing observations available on the Web (http://www.eso.org/eis), is a concerted effort by ESO and the Member State community to provide targets for the first year of operation of the VLT. It consists of tw...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "l costa_3", "name": "Luiz [\"Nicolaci\",\"da\"] Costa", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "e bertin_1", "name": "E. Bertin", "publication_history": null, "h_index": null, "num_pape...
null
15062968
hep-ph/9802439
1998-02-26
The Singular Behaviour of QCD Amplitudes at Two-loop Order
We discuss the structure of infrared singularities in on-shell QCD amplitudes at two-loop order. We present a general factorization formula that controls all the $\ep$-poles of the dimensionally regularized amplitudes. The dependence on the regularization scheme is considered and the coefficients of the $1/\ep^4, 1/\ep...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
29829074
quant-ph/9802067
1998-02-26
Quantum Robots and Environments
Quantum robots and their interactions with environments of quantum systems are described and their study justified. A quantum robot is a mobile quantum system that includes a quantum computer and needed ancillary systems on board. Quantum robots carry out tasks whose goals include specified changes in the state of the ...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18829792
hep-ph/9802446
1998-02-27
Next-to-leading order corrections to gauge-mediated gaugino masses
We compute the next-to-leading order corrections to the gaugino masses $M_i$ in gauge-mediated models for generic values of the messenger masses M and discuss the predictions of unified messenger models. If M<100 TeV there can be up to 10% corrections to the leading order relations $M_i\propto \alpha_i$. If the messeng...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8642731
hep-th/9803001
1998-02-28
Macroscopic strings as heavy quarks: Large-N gauge theory and anti-de Sitter supergravity
We study some aspects of Maldacena's large $N$ correspondence between N=4 superconformal gauge theory on D3-brane and maximal supergravity on AdS_5xS_5 by introducing macroscopic strings as heavy (anti)-quark probes. The macroscopic strings are semi-infinite Type IIB strings ending on D3-brane world-volume. We first st...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9002625
astro-ph/9803010
1998-03-03
The Redshift Evolution of the Metagalactic Ionizing Flux Inferred from Metal Line Ratios in the Lyman Forest
Metal line ratios in a sample of 13 quasar spectra obtained with the HIRES spectrograph on the KeckI telescope have been analyzed to characterize the evolution of the metagalactic ionizing flux near a redshift of 3. The evolution of SiIV/CIV has been determined using three different techniques: using total column densi...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16885751
chao-dyn/9803002
1998-03-03
Lyapunov Exponents from Node-Counting Arguments
A conjecture connecting Lyapunov exponents of coupled map lattices and the node theorem is presented. It is based on the analogy between the linear stability analysis of extended chaotic states and the Schr\"odinger problem for a particle in a disordered potential. As a consequence, we propose an alternative method to ...
[ "chao-dyn", "cond-mat", "nlin.CD", "nlin.PS", "patt-sol" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a politi_1", "name": "Antonio Politi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a torcini_1", "name": "Alessandro Torcini", "publication_history": null, "h_index": null, "num_papers": nu...
null
2948183
quant-ph/9803006
1998-03-03
Unconditional Security Of Quantum Key Distribution Over Arbitrarily Long Distances
Quantum key distribution is widely thought to offer unconditional security in communication between two users. Unfortunately, a widely accepted proof of its security in the presence of source, device and channel noises has been missing. This long-standing problem is solved here by showing that, given fault-tolerant qua...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11725140
math/9803163
1998-03-04
On the h-function
The paper is devoted to study the $H$-function defined by the Mellin-Barnes integral $$H^{m,n}_{\thinspace p,q}(z)={\frac1{2\pi i}}\int_{\Lss} \HHs^{m,n}_{\thinspace p,q}(s)z^{-s}ds,$$ where the function $\HH^{m,n}_{\thinspace p,q}(s)$ is a certain ratio of products of Gamma functions with the argument $s$ and the cont...
[ "math.CA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17416208
astro-ph/9803040
1998-03-04
Moving Gravitational Lenses: imprints on the CMB
With the new generation of instruments for Cosmic Microwave Background (CMB) observations aiming at an accuracy level of a few percent in the measurement of the angular power spectrum of the anisotropies, the study of the contributions due to secondary effects has gained impetus. Furthermore, a reinvestigation of the m...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "n aghanim_1", "name": "Nabila Aghanim", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "o forni_1", "name": "Olivier Forni", "publication_history": null, "h_index": null, "num_papers": null, ...
null
11112994
physics/9803008
1998-03-08
Annealed Importance Sampling
Simulated annealing - moving from a tractable distribution to a distribution of interest via a sequence of intermediate distributions - has traditionally been used as an inexact method of handling isolated modes in Markov chain samplers. Here, it is shown how one can use the Markov chain transitions for such an anneali...
[ "physics.comp-ph", "physics.data-an" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
14444472
hep-th/9803076
1998-03-09
String Expansion as Large N Expansion of Gauge Theories
We consider string perturbative expansion in the presence of D-branes imbedded in orbifolded space-time. In the regime where the string coupling is weak and $\alpha'\to 0$, the string perturbative expansion coincides with `t Hooft's large N expansion. We specifically concentrate on theories with d=4 and ${\cal N}=0,1,2...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14585592
gr-qc/9803033
1998-03-10
The many faces of superradiance
Inertial motion superradiance, the emission of radiation by an initially unexcited system moving inertially but superluminally through a medium, has long been known. Rotational superradiance, the amplification of radiation by a rotating rigid object, was recognized much later, principally in connection with black hole ...
[ "gr-qc", "astro-ph", "physics.atom-ph", "physics.optics" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8500008
cond-mat/9803107
1998-03-10
Green Function Monte Carlo with Stochastic Reconfiguration
A new method for the stabilization of the sign problem in the Green Function Monte Carlo technique is proposed. The method is devised for real lattice Hamiltonians and is based on an iterative ''stochastic reconfiguration'' scheme which introduces some bias but allows a stable simulation with constant sign. The systema...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
15903444
hep-ph/9803315
1998-03-11
The Hierarchy Problem and New Dimensions at a Millimeter
We propose a new framework for solving the hierarchy problem which does not rely on either supersymmetry or technicolor. In this framework, the gravitational and gauge interactions become united at the weak scale, which we take as the only fundamental short distance scale in nature. The observed weakness of gravity on ...
[ "hep-ph", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14078104
astro-ph/9803125
1998-03-11
An Automated Cluster Finder: the Adaptive Matched Filter
We describe an automated method for detecting clusters of galaxies in imaging and redshift galaxy surveys. The Adaptive Matched Filter (AMF) method utilizes galaxy positions, magnitudes, and---when available---photometric or spectroscopic redshifts to find clusters and determine their redshift and richness. The AMF can...
[ "astro-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "j kepner_1", "name": "Jeremy Kepner", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "x fan_29", "name": "Xiaohui Fan", "publication_history": null, "h_index": null, "num_papers": null, "nu...
null
117995206
cond-mat/9803179
1998-03-13
Asymptotically exact solutions of Harper equation
We present asymptotically exact solutions of an incommensurate Harper equation---one-dimensional Schroedinger equation of one particle on a lattice in a cosine potential. The wave functions can be written as an infinite product of string polynomials. The roots of these polynomials are solutions of Bethe equations. They...
[ "cond-mat", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a abanov_1", "name": "Alexander [\"G.\"] Abanov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j talstra_1", "name": "Johan [\"Cornelis\"] Talstra", "publication_history": null, "h_index": null,...
null
119512504
astro-ph/9803150
1998-03-13
Gravitational Lensing Effect on Cosmic Microwave Background Polarization
We investigate the effect of gravitational lensing by matter distribution in the universe on the cosmic microwave background (CMB) polarization power spectra and temperature-polarization cross-correlation spectrum. As in the case of temperature spectrum gravitational lensing leads to smoothing of narrow features and en...
[ "astro-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "m zaldarriaga_1", "name": "Matias Zaldarriaga", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "u seljak_2", "name": "Uroš Seljak", "publication_history": null, "h_index": null, "num_papers": n...
null
55504623
astro-ph/9803157
1998-03-13
On the Binary Properties and the Spatial and Kinematical Distribution of Young Stars
The effects which star cluster concentration and binarity have on observable parameters, that characterise the dynamical state of a population of stars after their birth aggregate dissolves, are investigated. To this end, the correlations between ejection velocity, binary proportion, mean system mass, binary orbital pe...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null