Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.843819
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.8438187681hartree
Shots1024
Runtime executionsingle-job
Resilience1
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
- 1024
- Precision
- 0.03125
- Resilience
- 1
- Submitted
- 2026-02-26T23:22:44+01:00
- Wall time (s)
- 397
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
23 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 | -0.8236220476 | 17.0981 | 11 | — |
| 2 | succeeded | -0.8311131905 | 17.9765 | 12 | — |
| 3 | succeeded | -0.8313280571 | 16.8512 | 11 | — |
| 4 | succeeded | -0.7933515716 | 16.5652 | 11 | — |
| 5 | succeeded | -0.8210113318 | 17.433 | 12 | — |
| 6 | succeeded | -0.7943152390 | 17.6128 | 11 | — |
| 7 | succeeded | -0.8151736077 | 16.7906 | 11 | — |
| 8 | succeeded | -0.8438187681 | 16.5434 | 11 | — |
| 9 | succeeded | -0.8169978567 | 16.4431 | 11 | — |
| 10 | succeeded | -0.8195431849 | 17.5946 | 11 | — |
| 11 | succeeded | -0.8102363727 | 17.3822 | 11 | — |
| 12 | succeeded | -0.8048365965 | 20.0172 | 15 | — |
| 13 | succeeded | -0.8069546783 | 18.8924 | 13 | — |
| 14 | succeeded | -0.8424059094 | 16.1677 | 11 | — |
| 15 | succeeded | -0.8422558001 | 16.4302 | 11 | — |
| 16 | succeeded | -0.7956775413 | 16.6319 | 11 | — |
| 17 | succeeded | -0.8295320131 | 16.3789 | 11 | — |
| 18 | succeeded | -0.8422191835 | 16.6553 | 11 | — |
| 19 | succeeded | -0.7887080203 | 16.453 | 11 | — |
| 20 | succeeded | -0.8395364594 | 16.3818 | 11 | — |
| 21 | succeeded | -0.8134777654 | 16.6682 | 11 | — |
| 22 | succeeded | -0.8258638673 | 16.9751 | 11 | — |
| 23 | succeeded | -0.8298667345 | 19.378 | 14 | — |