Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.86115
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8326710762hartree
Shots1024
Runtime executionsession
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
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-09-26T15:48:17+02:00
- Wall time (s)
- 107
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 | -1.8099766147 | 2605.95 | 2 | — |
| 2 | succeeded | -0.5882818398 | 6.16619 | 2 | — |
| 3 | succeeded | -0.8661219079 | 6.03407 | 2 | — |
| 4 | succeeded | -1.5862496294 | 5.88922 | 2 | — |
| 5 | succeeded | -1.6754251088 | 5.88093 | 2 | — |
| 6 | succeeded | -1.8611475229 | 6.08951 | 2 | — |
| 7 | succeeded | -1.8077414750 | 5.39717 | 2 | — |
| 8 | succeeded | -1.8401679719 | 6.42077 | 2 | — |
| 9 | succeeded | -1.8384595778 | 5.60916 | 2 | — |
| 10 | succeeded | -1.8468063262 | 5.80338 | 2 | — |
| 11 | succeeded | -1.8386763853 | 5.64054 | 2 | — |
| 12 | succeeded | -1.8494881138 | 6.06167 | 2 | — |
| 13 | succeeded | -1.8483585971 | 6.03918 | 2 | — |
| 14 | succeeded | -1.8470166172 | 5.98288 | 2 | — |
| 15 | succeeded | -1.8508322659 | 6.05315 | 2 | — |
| 16 | succeeded | -1.8521720736 | 6.06832 | 2 | — |
| 17 | succeeded | -1.8427738701 | 5.62862 | 2 | — |
| 18 | succeeded | -1.8326710762 | 5.84794 | 2 | — |