Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.8543
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_fez
Final energy-1.8306288503hartree
Shots1024
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_fez
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-12-28T17:01:04+01:00
- Wall time (s)
- 152
Molecular system
- Charge
- 0
- Multiplicity
- 1
- Basis
- STO-3G
- Active space
- 2e,2o
- Active electrons
- 2
- Spatial orbitals
- 2
- Geometry units
- angstrom
Circuit
- Logical qubits
- 1
- Physical qubits
- —
- Parameters
- —
- Depth
- 1
- Two-qubit gates
- 0
- Hamiltonian terms
- —
Dataset publication
Associated articles
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware submitted to Quantum Science and Technology
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware DOI 10.48550/arXiv.2604.11478 arXiv 2604.11478 published preprint
Compute access
- Fraunhofer Quantum Now and EQeS · IBM Quantum · allocation: Fraunhofer Quantum Now
Optimization trajectory
20 recorded objective evaluations. Charts use cumulative time so convergence cost remains comparable across calculations.
| Attempt | Outcome | Energy (Ha) | Elapsed (s) | Quantum (s) | Parameters |
|---|---|---|---|---|---|
| 1 | succeeded | -1.8353441752 | 47.7306 | 2 | — |
| 2 | succeeded | -0.5811448418 | 8.00577 | 2 | — |
| 3 | succeeded | -0.8444312501 | 6.56065 | 1 | — |
| 4 | succeeded | -1.6234153449 | 6.80148 | 2 | — |
| 5 | succeeded | -1.6671585942 | 7.36866 | 1 | — |
| 6 | succeeded | -1.8391706846 | 7.72265 | 1 | — |
| 7 | succeeded | -1.8398861358 | 7.49296 | 1 | — |
| 8 | succeeded | -1.8252652751 | 6.78254 | 2 | — |
| 9 | succeeded | -1.8457548711 | 9.23372 | 1 | — |
| 10 | succeeded | -1.8237086599 | 6.72268 | 1 | — |
| 11 | succeeded | -1.8369225120 | 7.28285 | 1 | — |
| 12 | succeeded | -1.8037090189 | 6.76331 | 1 | — |
| 13 | succeeded | -1.8108481890 | 7.23078 | 1 | — |
| 14 | succeeded | -1.8164979447 | 7.04729 | 1 | — |
| 15 | succeeded | -1.8456096087 | 6.5624 | 1 | — |
| 16 | succeeded | -1.8543032219 | 7.82836 | 1 | — |
| 17 | succeeded | -1.8498480115 | 6.52776 | 1 | — |
| 18 | succeeded | -1.8263210745 | 6.79473 | 1 | — |
| 19 | succeeded | -1.8390406274 | 7.39903 | 1 | — |
| 20 | succeeded | -1.8306288503 | 7.33145 | 1 | — |