Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.953224
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.9532239639hartree
Shots512
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
- 512
- Precision
- 0.0441942
- Resilience
- 0
- Submitted
- 2026-02-24T23:11:35+01:00
- Wall time (s)
- 113
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
21 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 | -0.8674128496 | 5.68432 | 2 | — |
| 2 | succeeded | -0.9044688923 | 5.30345 | 2 | — |
| 3 | succeeded | -0.8739402457 | 5.36612 | 2 | — |
| 4 | succeeded | -0.8619466658 | 5.35259 | 2 | — |
| 5 | succeeded | -0.8548956830 | 5.2503 | 2 | — |
| 6 | succeeded | -0.8887282421 | 5.60537 | 2 | — |
| 7 | succeeded | -0.8919194143 | 5.31451 | 2 | — |
| 8 | succeeded | -0.8982705964 | 5.16282 | 2 | — |
| 9 | succeeded | -0.8243565561 | 5.24285 | 2 | — |
| 10 | succeeded | -0.8762601077 | 5.17248 | 2 | — |
| 11 | succeeded | -0.8902601170 | 5.21089 | 2 | — |
| 12 | succeeded | -0.8791339973 | 5.09864 | 2 | — |
| 13 | succeeded | -0.8909225301 | 5.26141 | 2 | — |
| 14 | succeeded | -0.9298224016 | 5.67719 | 2 | — |
| 15 | succeeded | -0.8819598319 | 5.1043 | 2 | — |
| 16 | succeeded | -0.8514711583 | 5.32038 | 2 | — |
| 17 | succeeded | -0.9049116276 | 5.54007 | 2 | — |
| 18 | succeeded | -0.8490638948 | 5.4182 | 2 | — |
| 19 | succeeded | -0.9532239639 | 5.17989 | 2 | — |
| 20 | succeeded | -0.9308568685 | 5.45528 | 2 | — |
| 21 | succeeded | -0.9141427758 | 5.63729 | 2 | — |