Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84183
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8418345860hartree
Shots4096
Runtime executionsingle-job
Resilience0
MappingPT
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
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-02-15T23:19:43+01:00
- Wall time (s)
- 169
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 | -1.8174669938 | 7.1567 | 3 | — |
| 2 | succeeded | -0.5613972379 | 7.72512 | 4 | — |
| 3 | succeeded | -0.8655566065 | 13.8723 | 10 | — |
| 4 | succeeded | -1.6005393394 | 9.90215 | 6 | — |
| 5 | succeeded | -1.6365445168 | 7.48569 | 3 | — |
| 6 | succeeded | -1.8352146610 | 7.17946 | 3 | — |
| 7 | succeeded | -1.8008863132 | 7.51589 | 3 | — |
| 8 | succeeded | -1.8297795406 | 6.66658 | 3 | — |
| 9 | succeeded | -1.8402281132 | 6.90143 | 3 | — |
| 10 | succeeded | -1.8296781624 | 7.68994 | 3 | — |
| 11 | succeeded | -1.8389029335 | 7.09437 | 3 | — |
| 12 | succeeded | -1.8288678835 | 7.11753 | 3 | — |
| 13 | succeeded | -1.8323312369 | 7.60214 | 3 | — |
| 14 | succeeded | -1.8410232210 | 7.02539 | 3 | — |
| 15 | succeeded | -1.8413587160 | 6.98331 | 3 | — |
| 16 | succeeded | -1.8415175203 | 7.54444 | 3 | — |
| 17 | succeeded | -1.8412508552 | 7.16736 | 3 | — |
| 18 | succeeded | -1.8353523208 | 7.74449 | 3 | — |
| 19 | succeeded | -1.8401392248 | 6.65341 | 3 | — |
| 20 | succeeded | -1.8307393922 | 7.37662 | 3 | — |
| 21 | succeeded | -1.8372070293 | 6.91169 | 3 | — |
| 22 | succeeded | -1.8418345860 | 7.13255 | 3 | — |