Method
- Mapper
- PF
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.82564
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8256370288hartree
Shots1024
Runtime executionsingle-job
Resilience0
MappingPF
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-01-15T17:08:51+01:00
- Wall time (s)
- 144
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
- 2
- Physical qubits
- —
- Parameters
- —
- Depth
- 17
- Two-qubit gates
- 4
- 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 | -1.7803592880 | 8.02463 | 4 | — |
| 2 | succeeded | -0.5971665293 | 8.49381 | 4 | — |
| 3 | succeeded | -0.8699248990 | 9.6855 | 5 | — |
| 4 | succeeded | -1.5867587534 | 10.179 | 6 | — |
| 5 | succeeded | -1.6223864296 | 8.63956 | 4 | — |
| 6 | succeeded | -1.8122778939 | 7.11239 | 3 | — |
| 7 | succeeded | -1.7822412640 | 6.77119 | 3 | — |
| 8 | succeeded | -1.8081428627 | 5.99816 | 2 | — |
| 9 | succeeded | -1.8084160102 | 8.7797 | 5 | — |
| 10 | succeeded | -1.8088343794 | 8.9638 | 5 | — |
| 11 | succeeded | -1.8012680904 | 7.63363 | 4 | — |
| 12 | succeeded | -1.8176060949 | 7.19543 | 3 | — |
| 13 | succeeded | -1.8038783126 | 5.48327 | 1 | — |
| 14 | succeeded | -1.8163775509 | 5.74074 | 1 | — |
| 15 | succeeded | -1.8037923589 | 5.18699 | 1 | — |
| 16 | succeeded | -1.8247177828 | 5.25264 | 1 | — |
| 17 | succeeded | -1.8013296120 | 5.38696 | 1 | — |
| 18 | succeeded | -1.7931027956 | 6.00017 | 1 | — |
| 19 | succeeded | -1.7914637134 | 6.01048 | 1 | — |
| 20 | succeeded | -1.8256370288 | 5.93312 | 1 | — |