Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.77254
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_torino
Final energy-1.7725355795hartree
Shots128
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
- 128
- Precision
- 0.0883883
- Resilience
- 0
- Submitted
- 2026-03-04T10:42:43+01:00
- Wall time (s)
- 313
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
23 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 | -1.7352289459 | 15.4356 | 1 | — |
| 2 | succeeded | -0.6889087457 | 16.0751 | 1 | — |
| 3 | succeeded | -0.8105066501 | 10.6489 | 1 | — |
| 4 | succeeded | -1.3208668274 | 12.0613 | 1 | — |
| 5 | succeeded | -1.6464978061 | 15.0509 | 1 | — |
| 6 | succeeded | -1.6266910788 | 13.3041 | 1 | — |
| 7 | succeeded | -1.7386283568 | 14.4366 | 1 | — |
| 8 | succeeded | -1.6781503397 | 11.3349 | 1 | — |
| 9 | succeeded | -1.7341016014 | 14.1936 | 1 | — |
| 10 | succeeded | -1.7148846123 | 14.1666 | 1 | — |
| 11 | succeeded | -1.7640544295 | 13.1059 | 1 | — |
| 12 | succeeded | -1.7199663514 | 16.5863 | 1 | — |
| 13 | succeeded | -1.7007493623 | 12.5948 | 1 | — |
| 14 | succeeded | -1.7086581514 | 14.4363 | 1 | — |
| 15 | succeeded | -1.5961832670 | 10.2388 | 1 | — |
| 16 | succeeded | -1.6894411623 | 17.4232 | 1 | — |
| 17 | succeeded | -1.7227934014 | 11.0587 | 1 | — |
| 18 | succeeded | -1.7725355795 | 10.9081 | 1 | — |
| 19 | succeeded | -1.6362995733 | 11.053 | 1 | — |
| 20 | succeeded | -1.6894411623 | 12.7983 | 1 | — |
| 21 | succeeded | -1.7454098014 | 13.009 | 1 | — |
| 22 | succeeded | -1.6566612842 | 23.1416 | 1 | — |
| 23 | succeeded | -1.6498798397 | 14.1654 | 1 | — |