Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84149
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_fez
Final energy-1.8347783308hartree
Shots1024
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_fez
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-12-17T13:56:00+01:00
- Wall time (s)
- 666
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
17 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 | -1.8391619960 | 1869.83 | 2 | — |
| 2 | succeeded | -0.5983846336 | 185.885 | 2 | — |
| 3 | succeeded | -0.8914179233 | 98.9841 | 2 | — |
| 4 | succeeded | -1.5772741801 | 110.186 | 2 | — |
| 5 | succeeded | -1.6834076152 | 7.24682 | 2 | — |
| 6 | succeeded | -1.8340846012 | 142.138 | 2 | — |
| 7 | succeeded | -1.8021978828 | 36.4496 | 2 | — |
| 8 | succeeded | -1.8279990584 | 6.81071 | 2 | — |
| 9 | succeeded | -1.8296207022 | 7.32876 | 2 | — |
| 10 | succeeded | -1.8303990099 | 6.74139 | 2 | — |
| 11 | succeeded | -1.8305399279 | 6.86477 | 2 | — |
| 12 | succeeded | -1.8330829696 | 7.49304 | 2 | — |
| 13 | succeeded | -1.8308217641 | 9.52394 | 4 | — |
| 14 | succeeded | -1.8296207022 | 7.22379 | 2 | — |
| 15 | succeeded | -1.8231189217 | 6.98781 | 2 | — |
| 16 | succeeded | -1.8414947467 | 7.41277 | 2 | — |
| 17 | succeeded | -1.8347783308 | 8.70434 | 2 | — |