Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 25
- Best energy (Ha)
- -1.86428
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_fez
Final energy-1.8260384959hartree
Shots1024
Runtime executionsession
Resilience1
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
- 1024
- Precision
- 0.03125
- Resilience
- 1
- Submitted
- 2025-11-20T12:49:38+01:00
- Wall time (s)
- 354
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 | -1.8407162791 | 2757.54 | 11 | — |
| 2 | succeeded | -0.5791313343 | 18.0867 | 11 | — |
| 3 | succeeded | -0.9055412113 | 17.623 | 11 | — |
| 4 | succeeded | -1.6237343334 | 19.5241 | 11 | — |
| 5 | succeeded | -1.6846316708 | 17.976 | 11 | — |
| 6 | succeeded | -1.8573248575 | 17.7178 | 11 | — |
| 7 | succeeded | -1.8145291399 | 17.6151 | 11 | — |
| 8 | succeeded | -1.8637055869 | 17.6547 | 11 | — |
| 9 | succeeded | -1.8242845578 | 18.6896 | 11 | — |
| 10 | succeeded | -1.8434970382 | 18.8355 | 10 | — |
| 11 | succeeded | -1.8535180601 | 17.9939 | 11 | — |
| 12 | succeeded | -1.8417362012 | 17.9646 | 10 | — |
| 13 | succeeded | -1.8416178630 | 18.765 | 10 | — |
| 14 | succeeded | -1.8642759096 | 18.233 | 11 | — |
| 15 | succeeded | -1.8444311497 | 18.29 | 10 | — |
| 16 | succeeded | -1.8477231504 | 19.3065 | 11 | — |
| 17 | succeeded | -1.8529538915 | 19.4995 | 11 | — |
| 18 | succeeded | -1.8403212414 | 17.3049 | 10 | — |
| 19 | succeeded | -1.8260384959 | 18.6428 | 11 | — |