Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 25
- Best energy (Ha)
- -1.85521
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_fez
Final energy-1.8411310817hartree
Shots4096
Runtime executionsession
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
- session
- Shots
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2025-11-20T14:54:16+01:00
- Wall time (s)
- 183
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
20 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 | -1.8295329000 | 14.7813 | 4 | — |
| 2 | succeeded | -0.5905078158 | 8.95391 | 3 | — |
| 3 | succeeded | -0.8932894320 | 8.50566 | 3 | — |
| 4 | succeeded | -1.6080654911 | 8.58413 | 3 | — |
| 5 | succeeded | -1.6412100181 | 8.77234 | 4 | — |
| 6 | succeeded | -1.8506355168 | 8.82612 | 3 | — |
| 7 | succeeded | -1.8185163449 | 8.89255 | 3 | — |
| 8 | succeeded | -1.8346726763 | 8.32541 | 3 | — |
| 9 | succeeded | -1.8483894823 | 8.51008 | 3 | — |
| 10 | succeeded | -1.8374769526 | 8.57301 | 3 | — |
| 11 | succeeded | -1.8475797465 | 8.82226 | 3 | — |
| 12 | succeeded | -1.8431288804 | 8.53701 | 3 | — |
| 13 | succeeded | -1.8511124729 | 8.36781 | 3 | — |
| 14 | succeeded | -1.8509899841 | 8.10497 | 3 | — |
| 15 | succeeded | -1.8431809102 | 8.05642 | 3 | — |
| 16 | succeeded | -1.8552110437 | 8.97932 | 3 | — |
| 17 | succeeded | -1.8456887223 | 10.3406 | 3 | — |
| 18 | succeeded | -1.8444882036 | 10.3285 | 3 | — |
| 19 | succeeded | -1.8513243930 | 10.5847 | 3 | — |
| 20 | succeeded | -1.8411310817 | 9.07536 | 3 | — |