Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 25
- Best energy (Ha)
- -1.85388
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8422437982hartree
Shots4096
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_pittsburgh
- Resource type
- ibm quantum hardware
- Processor family
- Heron r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2025-11-20T12:46:13+01:00
- Wall time (s)
- 162
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 | -1.8344081493 | 2938.46 | 4 | — |
| 2 | succeeded | -0.5898183966 | 8.62137 | 4 | — |
| 3 | succeeded | -0.8696551773 | 9.19027 | 4 | — |
| 4 | succeeded | -1.6206246105 | 8.3427 | 4 | — |
| 5 | succeeded | -1.6440164666 | 8.58005 | 4 | — |
| 6 | succeeded | -1.8538847780 | 8.75165 | 4 | — |
| 7 | succeeded | -1.8063095207 | 8.35405 | 4 | — |
| 8 | succeeded | -1.8311209775 | 8.81838 | 4 | — |
| 9 | succeeded | -1.8441657075 | 9.00414 | 4 | — |
| 10 | succeeded | -1.8499298404 | 9.06787 | 4 | — |
| 11 | succeeded | -1.8532316743 | 9.82864 | 4 | — |
| 12 | succeeded | -1.8510945866 | 8.40644 | 4 | — |
| 13 | succeeded | -1.8535503691 | 10.5701 | 4 | — |
| 14 | succeeded | -1.8444518880 | 9.49821 | 4 | — |
| 15 | succeeded | -1.8522956484 | 8.81997 | 4 | — |
| 16 | succeeded | -1.8477548080 | 8.69488 | 4 | — |
| 17 | succeeded | -1.8483911114 | 8.74949 | 4 | — |
| 18 | succeeded | -1.8422437982 | 9.03384 | 4 | — |