Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.77208
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.7669573689hartree
Shots2048
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
- 2048
- Precision
- 0.0220971
- Resilience
- 0
- Submitted
- 2025-11-25T11:52:32+01:00
- Wall time (s)
- 470
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 | -1.7494964253 | 120.975 | 3 | — |
| 2 | succeeded | -0.5916064473 | 7.1263 | 2 | — |
| 3 | succeeded | -0.8590163382 | 7.05151 | 2 | — |
| 4 | succeeded | -1.5402136101 | 7.63498 | 2 | — |
| 5 | succeeded | -1.5994720339 | 6.38364 | 2 | — |
| 6 | succeeded | -1.7720824831 | 6.56721 | 2 | — |
| 7 | succeeded | -1.7431583705 | 6.48482 | 2 | — |
| 8 | succeeded | -1.7624316996 | 6.34883 | 2 | — |
| 9 | succeeded | -1.7586941125 | 6.47359 | 2 | — |
| 10 | succeeded | -1.7718689339 | 27.3833 | 2 | — |
| 11 | succeeded | -1.7656891063 | 8.25275 | 2 | — |
| 12 | succeeded | -1.7657931658 | 6.96702 | 2 | — |
| 13 | succeeded | -1.7681606029 | 6.71626 | 2 | — |
| 14 | succeeded | -1.7628262838 | 6.21034 | 2 | — |
| 15 | succeeded | -1.7593987029 | 327.345 | 2 | — |
| 16 | succeeded | -1.7686549022 | 6.51714 | 2 | — |
| 17 | succeeded | -1.7548058327 | 6.52411 | 2 | — |
| 18 | succeeded | -1.7669573689 | 6.33458 | 2 | — |