qubithubuccsd-ansatz
Unitary Coupled Cluster Singles and Doubles (UCCSD) ansatz — the gold-standard variational wavefunction for quantum chemistry on near-term hardware. Maps fermionic single and double excitation operators to qubit gates via the Jordan-Wigner transformation, producing a physically motivated parameterised circuit that captures electron correlation effects. Default configuration models minimal-basis H2 (4 spin-orbitals, 2 electrons).
- Framework
- Cirq
- Qubits
- 4
- Depth
- 30
- Gate set
- RX, RY, RZ +1
- Licence
- Not specified
- Version
- v1
- Updated
- 3 days ago
- Last run
- 3 months ago
5 of 6 runs
Runs
| Status | Backend | Shots | Wall time |
|---|---|---|---|
| Simulator cirq.simulator | 1024 | 25.7 s | |
| Simulator cirq.simulator | 1024 | 23.1 s | |
| Simulator qiskit_aer | 1024 | 21.2 s | |
| Simulator qiskit_aer | 1024 | 12.8 s | |
| Simulator qiskit_aer | 1024 | 13.2 s |
Lineage
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Suggested citation
@software{qubithub_uccsdansatz_2026,
author = {QubitHub Circuits},
title = {UCCSD Ansatz},
year = {2026},
version = {v1},
url = {https://qubithub.co/qubithub/uccsd-ansatz},
}Generated from this circuit's metadata. QubitHub does not mint DOIs, so this is not a registered identifier — check it against your venue's requirements before publishing.