Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.16811
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.1681078770hartree
Shots512
Runtime executionsingle-job
Resilience2
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
- 512
- Precision
- 0.0441942
- Resilience
- 2
- Submitted
- 2026-03-03T13:03:21+01:00
- Wall time (s)
- 505
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
25 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 | -0.8302479070 | 19.7257 | 13 | — |
| 2 | succeeded | -0.9414746122 | 21.7049 | 14 | — |
| 3 | succeeded | -0.8460698491 | 20.5675 | 13 | — |
| 4 | succeeded | -0.9729092524 | 19.2706 | 13 | — |
| 5 | succeeded | -1.0479429081 | 19.3562 | 13 | — |
| 6 | succeeded | -0.8128416198 | 19.3818 | 13 | — |
| 7 | succeeded | -0.9960648725 | 19.7384 | 13 | — |
| 8 | succeeded | -1.1114002524 | 18.8181 | 13 | — |
| 9 | succeeded | -0.9424165788 | 19.7173 | 13 | — |
| 10 | succeeded | -1.0353845978 | 19.3192 | 13 | — |
| 11 | succeeded | -1.0114412578 | 27.7274 | 20 | — |
| 12 | succeeded | -1.0890366855 | 22.6429 | 16 | — |
| 13 | succeeded | -0.9565451229 | 19.625 | 13 | — |
| 14 | succeeded | -1.0623966861 | 19.3082 | 13 | — |
| 15 | succeeded | -0.9352107154 | 19.9596 | 13 | — |
| 16 | succeeded | -0.8257292744 | 19.2521 | 13 | — |
| 17 | succeeded | -1.1681078770 | 19.9675 | 13 | — |
| 18 | succeeded | -0.9625194116 | 19.0483 | 13 | — |
| 19 | succeeded | -1.1015528119 | 19.4405 | 13 | — |
| 20 | succeeded | -0.9320705818 | 21.1369 | 14 | — |
| 21 | succeeded | -0.9149930662 | 20.3902 | 13 | — |
| 22 | succeeded | -0.9089857824 | 19.7999 | 13 | — |
| 23 | succeeded | -0.9664361090 | 19.5937 | 13 | — |
| 24 | succeeded | -1.0849354755 | 19.5003 | 13 | — |
| 25 | succeeded | -0.9451275230 | 19.4164 | 13 | — |