Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.77805
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.7589726904hartree
Shots512
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
- 512
- Precision
- 0.0441942
- Resilience
- 0
- Submitted
- 2025-11-25T12:13:32+01:00
- Wall time (s)
- 125
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
20 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 | -1.7535917379 | 8.15332 | 1 | — |
| 2 | succeeded | -0.6062305662 | 6.7226 | 1 | — |
| 3 | succeeded | -0.9009505284 | 6.94292 | 1 | — |
| 4 | succeeded | -1.5105740463 | 5.8192 | 1 | — |
| 5 | succeeded | -1.5562966650 | 6.41729 | 1 | — |
| 6 | succeeded | -1.7609542320 | 6.05857 | 1 | — |
| 7 | succeeded | -1.7407486443 | 5.88164 | 1 | — |
| 8 | succeeded | -1.7763468838 | 5.83049 | 1 | — |
| 9 | succeeded | -1.7569911488 | 6.07724 | 1 | — |
| 10 | succeeded | -1.7729605059 | 6.16137 | 2 | — |
| 11 | succeeded | -1.7722537434 | 5.71534 | 1 | — |
| 12 | succeeded | -1.7707014725 | 6.13794 | 1 | — |
| 13 | succeeded | -1.7777690974 | 5.8128 | 1 | — |
| 14 | succeeded | -1.7780465893 | 5.72216 | 1 | — |
| 15 | succeeded | -1.7732466863 | 6.61005 | 1 | — |
| 16 | succeeded | -1.7454054570 | 6.35198 | 1 | — |
| 17 | succeeded | -1.7632132654 | 6.12085 | 1 | — |
| 18 | succeeded | -1.7745171211 | 6.63399 | 2 | — |
| 19 | succeeded | -1.7684424390 | 5.46675 | 1 | — |
| 20 | succeeded | -1.7589726904 | 5.85144 | 1 | — |