Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.10475
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.9592223006hartree
Shots64
Runtime executionsingle-job
Resilience0
MappingJW
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_brussels
- Resource type
- ibm quantum hardware
- Processor family
- Eagle r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 64
- Precision
- 0.125
- Resilience
- 0
- Submitted
- 2026-02-15T23:24:43+01:00
- Wall time (s)
- 95
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
- 4
- Physical qubits
- —
- Parameters
- —
- Depth
- 96
- Two-qubit gates
- 48
- 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
18 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 | -1.0570745074 | 4.52622 | 1 | — |
| 2 | succeeded | -0.9898540322 | 4.66606 | 1 | — |
| 3 | succeeded | -0.9544823993 | 4.6449 | 1 | — |
| 4 | succeeded | -0.7831164745 | 4.54648 | 1 | — |
| 5 | succeeded | -0.8655097390 | 4.72558 | 1 | — |
| 6 | succeeded | -1.1047480947 | 4.41632 | 1 | — |
| 7 | succeeded | -0.9132265703 | 4.76719 | 1 | — |
| 8 | succeeded | -0.8996236429 | 4.96099 | 1 | — |
| 9 | succeeded | -0.9102676740 | 4.49595 | 1 | — |
| 10 | succeeded | -0.8323854444 | 4.48962 | 1 | — |
| 11 | succeeded | -0.8309112148 | 4.97486 | 1 | — |
| 12 | succeeded | -1.0941447197 | 4.69092 | 1 | — |
| 13 | succeeded | -0.9375740094 | 5.21587 | 2 | — |
| 14 | succeeded | -0.9958124898 | 4.70003 | 1 | — |
| 15 | succeeded | -1.0523840784 | 4.79197 | 1 | — |
| 16 | succeeded | -0.9745571678 | 4.72913 | 1 | — |
| 17 | succeeded | -1.0336931901 | 8.51828 | 4 | — |
| 18 | succeeded | -0.9592223006 | 11.7001 | 8 | — |