Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.902748
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.9027481880hartree
Shots4096
Runtime executionsingle-job
Resilience0
MappingJW
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
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-02-24T23:20:06+01:00
- Wall time (s)
- 227
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
- 4
- Physical qubits
- —
- Parameters
- —
- Depth
- 96
- Two-qubit gates
- 48
- 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 | -0.8856094242 | 11.5147 | 7 | — |
| 2 | succeeded | -0.9027481880 | 11.4092 | 7 | — |
| 3 | succeeded | -0.8991961652 | 11.007 | 7 | — |
| 4 | succeeded | -0.8663734493 | 11.8287 | 7 | — |
| 5 | succeeded | -0.8948591747 | 11.1353 | 7 | — |
| 6 | succeeded | -0.8934290863 | 12.7905 | 7 | — |
| 7 | succeeded | -0.8849665267 | 11.2664 | 7 | — |
| 8 | succeeded | -0.8940936991 | 11.9229 | 7 | — |
| 9 | succeeded | -0.8763793932 | 11.6989 | 7 | — |
| 10 | succeeded | -0.8910396967 | 14.0451 | 9 | — |
| 11 | succeeded | -0.8960912508 | 16.6249 | 12 | — |
| 12 | succeeded | -0.8907256303 | 11.5332 | 7 | — |
| 13 | succeeded | -0.8929082218 | 11.7411 | 7 | — |
| 14 | succeeded | -0.8871245716 | 11.168 | 7 | — |
| 15 | succeeded | -0.8770680873 | 11.2777 | 7 | — |
| 16 | succeeded | -0.8922400033 | 11.5188 | 7 | — |
| 17 | succeeded | -0.8766488055 | 11.2587 | 7 | — |
| 18 | succeeded | -0.8769163690 | 11.5462 | 7 | — |
| 19 | succeeded | -0.8879188784 | 11.194 | 7 | — |