Method
- Mapper
- PF
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.76729
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.7296895507hartree
Shots1024
Runtime executionsession
Resilience0
MappingPF
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
- 2025-09-26T19:19:02+02:00
- 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
- 2
- Physical qubits
- —
- Parameters
- —
- Depth
- 17
- Two-qubit gates
- 4
- 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 | -1.7482809500 | 1912.32 | 2 | — |
| 2 | succeeded | -0.5743720810 | 5.61063 | 2 | — |
| 3 | succeeded | -0.9247636206 | 5.93627 | 2 | — |
| 4 | succeeded | -1.5746674193 | 5.91298 | 2 | — |
| 5 | succeeded | -1.5680310806 | 5.29417 | 2 | — |
| 6 | succeeded | -1.7485387296 | 5.71101 | 2 | — |
| 7 | succeeded | -1.7161453738 | 5.77793 | 2 | — |
| 8 | succeeded | -1.7672854352 | 5.67128 | 2 | — |
| 9 | succeeded | -1.7568227233 | 5.54107 | 2 | — |
| 10 | succeeded | -1.7504618404 | 5.80753 | 2 | — |
| 11 | succeeded | -1.7492751668 | 5.85646 | 2 | — |
| 12 | succeeded | -1.7597775973 | 5.48207 | 2 | — |
| 13 | succeeded | -1.7519988248 | 5.57625 | 2 | — |
| 14 | succeeded | -1.7533835531 | 5.44445 | 2 | — |
| 15 | succeeded | -1.7513535839 | 5.62388 | 2 | — |
| 16 | succeeded | -1.7396854455 | 5.54412 | 2 | — |
| 17 | succeeded | -1.7656672780 | 5.96492 | 2 | — |
| 18 | succeeded | -1.7296895507 | 5.98769 | 3 | — |