Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.8822
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8822007911hartree
Shots64
Runtime executionsingle-job
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
- single-job
- Shots
- 64
- Precision
- 0.125
- Resilience
- 0
- Submitted
- 2026-03-03T13:39:29+01:00
- Wall time (s)
- 221
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
19 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 | -1.8595843912 | 8.64697 | 1 | — |
| 2 | succeeded | -0.5289289950 | 8.32934 | 1 | — |
| 3 | succeeded | -0.8625208946 | 8.44308 | 1 | — |
| 4 | succeeded | -1.2287188994 | 9.00565 | 1 | — |
| 5 | succeeded | -1.8471662239 | 22.0068 | 8 | — |
| 6 | succeeded | -1.7227760241 | 8.52294 | 1 | — |
| 7 | succeeded | -1.8358580240 | 8.06634 | 1 | — |
| 8 | succeeded | -1.7499018022 | 8.1322 | 1 | — |
| 9 | succeeded | -1.7759176131 | 8.01594 | 1 | — |
| 10 | succeeded | -1.8822007911 | 25.2676 | 5 | — |
| 11 | succeeded | -1.7838264022 | 8.96898 | 1 | — |
| 12 | succeeded | -1.7815717131 | 8.46852 | 1 | — |
| 13 | succeeded | -1.7453924241 | 8.30392 | 1 | — |
| 14 | succeeded | -1.7725182022 | 8.35128 | 1 | — |
| 15 | succeeded | -1.7092131350 | 13.8388 | 5 | — |
| 16 | succeeded | -1.7069584459 | 16.9671 | 1 | — |
| 17 | succeeded | -1.8234051021 | 16.1159 | 1 | — |
| 18 | succeeded | -1.7702635131 | 15.9978 | 5 | — |
| 19 | succeeded | -1.7759176131 | 9.47582 | 1 | — |