Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.87655
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_kingston
Final energy-1.8765466912hartree
Shots64
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_kingston
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 64
- Precision
- 0.125
- Resilience
- 0
- Submitted
- 2026-03-31T23:09:18+02:00
- Wall time (s)
- 239
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
22 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 | -1.8256597912 | 15.9012 | 1 | — |
| 2 | succeeded | -0.6589385402 | 10.525 | 1 | — |
| 3 | succeeded | -0.8591214837 | 10.7158 | 1 | — |
| 4 | succeeded | -1.4084706227 | 9.33141 | 1 | — |
| 5 | succeeded | -1.6063641225 | 9.83684 | 1 | — |
| 6 | succeeded | -1.7137225132 | 8.15155 | 1 | — |
| 7 | succeeded | -1.7962793240 | 11.6049 | 1 | — |
| 8 | succeeded | -1.8007887022 | 12.7818 | 1 | — |
| 9 | succeeded | -1.8098422131 | 10.8265 | 1 | — |
| 10 | succeeded | -1.8313138912 | 11.1374 | 1 | — |
| 11 | succeeded | -1.8765466912 | 9.33672 | 1 | — |
| 12 | succeeded | -1.7419930132 | 8.9563 | 1 | — |
| 13 | succeeded | -1.8369679912 | 9.62075 | 1 | — |
| 14 | succeeded | -1.7612100022 | 8.87659 | 1 | — |
| 15 | succeeded | -1.7951346022 | 8.45593 | 1 | — |
| 16 | succeeded | -1.7781723022 | 8.64106 | 1 | — |
| 17 | succeeded | -1.8369679912 | 9.34685 | 1 | — |
| 18 | succeeded | -1.7838264022 | 9.33377 | 1 | — |
| 19 | succeeded | -1.7589553131 | 9.95674 | 1 | — |
| 20 | succeeded | -1.7702635131 | 9.96811 | 1 | — |
| 21 | succeeded | -1.7838264022 | 25.9624 | 1 | — |
| 22 | succeeded | -1.7973892913 | 11.0866 | 1 | — |