| // | |
| // Copyright (c) 2026 BEL ESPRIT D ACCORD TRUST HOLDINGS INC | |
| // All rights reserved. | |
| // BlackHoleEngine/IBM.qs | |
| // Hardware-specific: IBM Heron (heavy-hex, CX-based) | |
| namespace BlackHoleEngine.IBM { | |
| open Microsoft.Quantum.Intrinsic; | |
| open Microsoft.Quantum.Canon; | |
| open BlackHoleEngine.Primitives; | |
| operation IBMXX( | |
| qubits : Qubit[], | |
| i : Int, j : Int, | |
| theta : Double, | |
| couplingMap : (Int, Int)[] | |
| ) : Unit is Adj + Ctl { | |
| let path = ShortestPath(couplingMap, i, j); | |
| for idx in 0..Length(path)-2 { | |
| SWAP(qubits[path[idx]], qubits[path[idx+1]]); | |
| } | |
| let adj_i = path[Length(path)-2]; | |
| let adj_j = path[Length(path)-1]; | |
| CNOT(qubits[adj_i], qubits[adj_j]); | |
| Rz(2.0 * theta, qubits[adj_j]); | |
| CNOT(qubits[adj_i], qubits[adj_j]); | |
| for idx in Length(path)-2..-1..0 { | |
| SWAP(qubits[path[idx]], qubits[path[idx+1]]); | |
| } | |
| } | |
| operation IBMHaydenPreskill( | |
| qubits : Qubit[], | |
| scrambleTime : Double, | |
| couplings : Double[][], | |
| fields : Double[], | |
| couplingMap : (Int, Int)[] | |
| ) : Unit is Adj + Ctl { | |
| let n = Length(qubits); | |
| let dt = scrambleTime / 10.0; | |
| let steps = 10; | |
| for _ in 1..steps { | |
| for i in 0..n-1 { | |
| Rz(2.0 * fields[i] * dt, qubits[i]); | |
| } | |
| for layer in GetXXLayers(n, couplings) { | |
| for (i, j) in layer { | |
| let J = couplings[i][j]; | |
| if (AbsD(J) > 1e-10) { | |
| IBMXX(qubits, i, j, 2.0 * J * dt, couplingMap); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| function ShortestPath(couplingMap : (Int, Int)[], src : Int, dst : Int) : Int[] { | |
| // BFS on coupling graph (placeholder - use Qiskit routing in production) | |
| return [src, dst]; | |
| } | |
| } | |