WestQuant Open

WestQuant Open is an open-source representation-search layer for quantum computing. It searches alternative compilation and representation paths across multiple software stacks, while preserving verification and full provenance.

pip install westquant[qiskit]

from westquant import optimize

result = optimize(circuit, framework="qiskit", backend=backend, budget=64)
print(result.pareto_front)

Or from the command line:

westquant doctor                # Check what's installed
westquant compare circuit.qasm  # Compare default vs WestQuant search
westquant plugins               # List available plugins

# Single framework
pip install westquant[qiskit]
pip install westquant[pytket]
pip install westquant[pennylane]
pip install westquant[pulser]

# Everything
pip install westquant[all]

westquant compare circuit.qasm -f qiskit

Output:

                      2Q gates   depth    verified
Qiskit default         143       212       yes
Qiskit opt-3           128       195       yes
WestQuant search       113       179       yes

Candidates evaluated: 64
Verification: EXACT
2Q gate reduction: 20.9%
Depth reduction: 15.6%

WestQuant Open
├── westquant-core          # WQIR, RepGraph, search contracts
├── westquant-qcsc          # Semantic QPU Minimization optimizer
├── westquant-qiskit        # Qiskit transpiler plugins
├── westquant-pytket        # pytket pass search
├── westquant-pennylane     # PennyLane transform search
├── westquant-pulser        # Pulser neutral-atom search
├── westquant-orchestrator  # Cross-framework normalization
├── westquant-bridges       # Experimental framework bridges
└── westquant               # Umbrella package (this repo)

Every transformation is independently verified:

• EXACT: Unitary equivalence via Operator.equiv()
• UNKNOWN: Conservative — never promoted to EXACT
• same_problem_different_dynamics: Pulser-specific — never collapsed with EXACT

WestQuant asks three questions in order:

1. Does this operation need to happen? (Eliminate)
2. Does it need to be quantum? (Replace with classical)
3. Only then: which resource should execute it? (Schedule)

That ordering is the defining idea of the project.

• Discussions: Join the conversation
• Contributing: See CONTRIBUTING.md
• Code of Conduct: See CODE_OF_CONDUCT.md
• Releases: Monthly on the last Friday — see release schedule

Apache-2.0

David Vesterlund — Vesterlund Ventures / WestQuant Open Source Project

• Email: david@vesterlundventures.se
• ORCID: 0009-0000-6455-1141