Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85958
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8369679912hartree
Shots16
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
- 16
- Precision
- 0.25
- Resilience
- 0
- Submitted
- 2026-02-11T22:55:45+01:00
- Wall time (s)
- 104
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
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 | -1.7917351913 | 6.34516 | 1 | — |
| 2 | succeeded | -0.5617088731 | 6.02657 | 1 | — |
| 3 | succeeded | -0.5798854041 | 5.6996 | 1 | — |
| 4 | succeeded | -1.6968297224 | 5.24472 | 1 | — |
| 5 | succeeded | -1.4480493227 | 5.77991 | 1 | — |
| 6 | succeeded | -1.7058484787 | 5.20632 | 1 | — |
| 7 | succeeded | -1.8369679912 | 4.9551 | 1 | — |
| 8 | succeeded | -1.6470180351 | 4.91708 | 1 | — |
| 9 | succeeded | -1.8369679912 | 4.68035 | 1 | — |
| 10 | succeeded | -1.7601000350 | 5.44785 | 1 | — |
| 11 | succeeded | -1.7917351913 | 5.32205 | 1 | — |
| 12 | succeeded | -1.8369679912 | 5.51106 | 1 | — |
| 13 | succeeded | -1.8595843912 | 5.47092 | 1 | — |
| 14 | succeeded | -1.8369679912 | 5.7784 | 1 | — |
| 15 | succeeded | -1.7691187913 | 5.78467 | 2 | — |
| 16 | succeeded | -1.8369679912 | 10.294 | 6 | — |
| 17 | succeeded | -1.7917351913 | 5.19315 | 1 | — |
| 18 | succeeded | -1.8369679912 | 5.49196 | 1 | — |