Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84362
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8138703249hartree
Shots1024
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_brussels
- Resource type
- ibm quantum hardware
- Processor family
- Eagle r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-12-30T17:35:42+01:00
- Wall time (s)
- 119
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 | -1.8091311062 | 6.9292 | 1 | — |
| 2 | succeeded | -0.6744873152 | 5.65167 | 1 | — |
| 3 | succeeded | -0.9392501049 | 5.20003 | 1 | — |
| 4 | succeeded | -1.6107673372 | 5.70736 | 1 | — |
| 5 | succeeded | -1.6385390573 | 5.0357 | 1 | — |
| 6 | succeeded | -1.8423511159 | 5.27426 | 1 | — |
| 7 | succeeded | -1.7959411479 | 5.43893 | 1 | — |
| 8 | succeeded | -1.8339480275 | 5.46423 | 1 | — |
| 9 | succeeded | -1.8436172063 | 5.151 | 1 | — |
| 10 | succeeded | -1.8278581403 | 5.44218 | 1 | — |
| 11 | succeeded | -1.8210051507 | 7.20906 | 3 | — |
| 12 | succeeded | -1.8395934388 | 5.76971 | 1 | — |
| 13 | succeeded | -1.8359165361 | 10.4061 | 6 | — |
| 14 | succeeded | -1.8413581729 | 7.74918 | 3 | — |
| 15 | succeeded | -1.8205130235 | 8.9889 | 5 | — |
| 16 | succeeded | -1.8330894861 | 6.85549 | 3 | — |
| 17 | succeeded | -1.8347154743 | 5.42535 | 1 | — |
| 18 | succeeded | -1.8301236902 | 5.17651 | 1 | — |
| 19 | succeeded | -1.8138703249 | 5.30177 | 1 | — |