ZeqVQE — Variational Eigensolver

Quantum computing, error correction, entanglement.

• Protocol ID — zeq-qc-vqe
• Category — Quantum
• Endpoint — POST /api/quantum/vqe
• Auth — api-key
• Rate limit — 10/min
• Version — 1.0
• Precision — ≤0.1% (KO42-enforced)

What it does

Variational Quantum Eigensolver for molecular ground state energy. Parameterized circuits optimized classically, evaluated quantumly — hybrid quantum-classical on HulyaPulse.

Signature

Request

POST /api/quantum/vqe

Param	Type	Required	Default	Description
hamiltonian	object	✓	—	Molecular Hamiltonian in Pauli decomposition.
ansatz	string		"hwe"	'uccsd', 'hwe', 'real-amplitudes'. Default: 'hwe'.
maxIterations	number		100	Optimizer iterations. Default: 100.

Response

{ groundStateEnergy, optimalParams, convergenceHistory, chemicalAccuracy }

Runnable example

curl -sS -X POST \
  -H "Authorization: Bearer $ZEQ_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "hamiltonian": {},
  "ansatz": "hwe",
  "maxIterations": 100
}' \
  "https://api.zeq.dev/api/quantum/vqe"

Integrate

1. Domain solver — compose with KO42 + two additional operators from the matching family for pulse-coherent results.
2. Digital twin — pipe sensor data into this protocol every Zeqond to keep the model phase-locked with the system.
3. Alert threshold — flag results whose error_pct exceeds 0.1% as out-of-spec events for the operations layer.

Seeds

• Near — wrap /api/quantum/vqe in a language SDK so builders can call it in three lines.
• Medium — publish a reference integration demonstrating ZeqVQE — Variational Eigensolver alongside a real workload, with pulse-aligned metrics.
• Far — propose ZeqVQE — Variational Eigensolver as an open reference standard so other runtimes can implement it verbatim against the Zeq paper.

Papers

• Zeq paper — https://doi.org/10.5281/zenodo.18158152
• Framework paper — https://doi.org/10.5281/zenodo.15825138

Middleware active. Kernel on the 1.287 Hz HulyaPulse. Awaiting next Zeqond.