Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.852935
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.8092250116hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-01-15T17:24:27+01:00
- Wall time (s)
- 140
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
18 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 | -0.8174753468 | 6.37525 | 2 | — |
| 2 | succeeded | -0.8133273114 | 7.17723 | 2 | — |
| 3 | succeeded | -0.8058603440 | 13.0428 | 9 | — |
| 4 | succeeded | -0.8121875568 | 8.81471 | 4 | — |
| 5 | succeeded | -0.8529347199 | 9.995 | 5 | — |
| 6 | succeeded | -0.8457511399 | 9.44896 | 6 | — |
| 7 | succeeded | -0.8183532447 | 10.1191 | 6 | — |
| 8 | succeeded | -0.7617399661 | 10.8186 | 6 | — |
| 9 | succeeded | -0.7800533303 | 6.90333 | 2 | — |
| 10 | succeeded | -0.8114416252 | 6.32884 | 2 | — |
| 11 | succeeded | -0.8094090486 | 6.51661 | 2 | — |
| 12 | succeeded | -0.8090760930 | 6.50528 | 2 | — |
| 13 | succeeded | -0.8089010738 | 6.2832 | 2 | — |
| 14 | succeeded | -0.7926634887 | 6.57942 | 2 | — |
| 15 | succeeded | -0.8063965472 | 6.22313 | 2 | — |
| 16 | succeeded | -0.8295017110 | 6.2878 | 2 | — |
| 17 | succeeded | -0.7989376112 | 6.07557 | 2 | — |
| 18 | succeeded | -0.8092250116 | 6.03861 | 2 | — |