Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84284
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8299068827hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-02-15T23:15:59+01:00
- Wall time (s)
- 111
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
19 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 | -1.8133673369 | 5.30472 | 1 | — |
| 2 | succeeded | -0.6166845692 | 5.10569 | 1 | — |
| 3 | succeeded | -0.8851286059 | 4.97782 | 1 | — |
| 4 | succeeded | -1.6316124866 | 5.09305 | 1 | — |
| 5 | succeeded | -1.6485052774 | 4.96043 | 1 | — |
| 6 | succeeded | -1.8386048402 | 4.8262 | 1 | — |
| 7 | succeeded | -1.8012396945 | 5.88895 | 2 | — |
| 8 | succeeded | -1.8428410709 | 5.42994 | 2 | — |
| 9 | succeeded | -1.8156285425 | 5.33771 | 1 | — |
| 10 | succeeded | -1.8282808945 | 5.21929 | 1 | — |
| 11 | succeeded | -1.8389560493 | 10.5696 | 7 | — |
| 12 | succeeded | -1.8345008389 | 7.0449 | 2 | — |
| 13 | succeeded | -1.8390254222 | 9.86138 | 6 | — |
| 14 | succeeded | -1.8314613258 | 5.16481 | 1 | — |
| 15 | succeeded | -1.8333713222 | 5.17424 | 1 | — |
| 16 | succeeded | -1.8256684799 | 4.99358 | 1 | — |
| 17 | succeeded | -1.8207211424 | 5.04582 | 1 | — |
| 18 | succeeded | -1.8330179410 | 5.19545 | 1 | — |
| 19 | succeeded | -1.8299068827 | 5.30509 | 1 | — |