Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.8562
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8304098707hartree
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
- 2025-12-30T17:39:12+01:00
- Wall time (s)
- 97
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 | -1.8112470494 | 6.21189 | 1 | — |
| 2 | succeeded | -0.5670139362 | 5.05621 | 1 | — |
| 3 | succeeded | -0.8791926698 | 4.93151 | 1 | — |
| 4 | succeeded | -1.5692201286 | 5.37182 | 1 | — |
| 5 | succeeded | -1.6354995441 | 4.96607 | 1 | — |
| 6 | succeeded | -1.8562001854 | 5.43434 | 2 | — |
| 7 | succeeded | -1.7804660902 | 5.63838 | 2 | — |
| 8 | succeeded | -1.8058249621 | 5.50191 | 2 | — |
| 9 | succeeded | -1.8253888159 | 9.12411 | 5 | — |
| 10 | succeeded | -1.8239080901 | 5.12917 | 1 | — |
| 11 | succeeded | -1.8413603451 | 4.70936 | 1 | — |
| 12 | succeeded | -1.8383208319 | 4.90166 | 1 | — |
| 13 | succeeded | -1.8463055104 | 5.3888 | 1 | — |
| 14 | succeeded | -1.8330938304 | 4.79659 | 1 | — |
| 15 | succeeded | -1.8309019978 | 5.10008 | 1 | — |
| 16 | succeeded | -1.8374731513 | 5.35001 | 1 | — |
| 17 | succeeded | -1.8164849117 | 4.97711 | 1 | — |
| 18 | succeeded | -1.8304098707 | 5.37045 | 1 | — |