Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.8497
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8496962327hartree
Shots1024
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_aachen
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-03-09T22:30:19+01:00
- Wall time (s)
- 139
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 | -1.8248858279 | 6.54104 | 2 | — |
| 2 | succeeded | -0.5819946946 | 6.06029 | 2 | — |
| 3 | succeeded | -0.9086577151 | 5.94136 | 2 | — |
| 4 | succeeded | -1.3177427362 | 6.52699 | 2 | — |
| 5 | succeeded | -1.7865407722 | 6.72159 | 3 | — |
| 6 | succeeded | -1.7695502341 | 6.32217 | 2 | — |
| 7 | succeeded | -1.8352097736 | 5.95529 | 2 | — |
| 8 | succeeded | -1.8334559003 | 6.08292 | 2 | — |
| 9 | succeeded | -1.8262321521 | 6.45242 | 2 | — |
| 10 | succeeded | -1.8287838825 | 5.83535 | 2 | — |
| 11 | succeeded | -1.8496962327 | 6.28676 | 2 | — |
| 12 | succeeded | -1.8282136937 | 5.91604 | 2 | — |
| 13 | succeeded | -1.8357756180 | 6.90487 | 2 | — |
| 14 | succeeded | -1.8267286236 | 6.21221 | 2 | — |
| 15 | succeeded | -1.8358471631 | 5.74528 | 2 | — |
| 16 | succeeded | -1.8268023409 | 5.89266 | 2 | — |
| 17 | succeeded | -1.8292044645 | 5.73373 | 2 | — |
| 18 | succeeded | -1.8287795382 | 6.49236 | 2 | — |
| 19 | succeeded | -1.8426286077 | 6.15998 | 2 | — |
| 20 | succeeded | -1.8383902048 | 6.52523 | 2 | — |
| 21 | succeeded | -1.8453862847 | 6.2836 | 2 | — |
| 22 | succeeded | -1.8299806000 | 6.03991 | 2 | — |