Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.6888
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_torino
Final energy-1.6887962043hartree
Shots4096
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_torino
- Resource type
- ibm quantum hardware
- Processor family
- Heron r1
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-03-04T11:10:09+01:00
- Wall time (s)
- 297
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 | -1.6512304742 | 12.8188 | 3 | — |
| 2 | succeeded | -0.6830952983 | 11.3747 | 3 | — |
| 3 | succeeded | -0.9310627039 | 10.0873 | 3 | — |
| 4 | succeeded | -1.2506643094 | 10.0436 | 3 | — |
| 5 | succeeded | -1.6565664565 | 17.6618 | 4 | — |
| 6 | succeeded | -1.6155748086 | 18.0198 | 3 | — |
| 7 | succeeded | -1.6887962043 | 14.232 | 3 | — |
| 8 | succeeded | -1.6414230584 | 16.2043 | 3 | — |
| 9 | succeeded | -1.6513210257 | 11.3973 | 3 | — |
| 10 | succeeded | -1.6704713229 | 17.8165 | 3 | — |
| 11 | succeeded | -1.6547426331 | 11.1214 | 3 | — |
| 12 | succeeded | -1.6480441035 | 16.0746 | 3 | — |
| 13 | succeeded | -1.6726165562 | 12.1808 | 3 | — |
| 14 | succeeded | -1.6881788732 | 11.5693 | 3 | — |
| 15 | succeeded | -1.6696664745 | 11.8845 | 3 | — |
| 16 | succeeded | -1.6827030929 | 15.9365 | 3 | — |
| 17 | succeeded | -1.6701087441 | 14.7099 | 3 | — |
| 18 | succeeded | -1.6796657519 | 14.638 | 3 | — |
| 19 | succeeded | -1.6771210811 | 13.5242 | 3 | — |
| 20 | succeeded | -1.6731460851 | 11.4251 | 3 | — |
| 21 | succeeded | -1.6854938273 | 10.8927 | 3 | — |
| 22 | succeeded | -1.6851052166 | 12.2248 | 3 | — |