Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85705
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8309106865hartree
Shots512
Runtime executionsession
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
- session
- Shots
- 512
- Precision
- 0.0441942
- Resilience
- 0
- Submitted
- 2025-11-25T11:42:54+01:00
- Wall time (s)
- 104
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 | -1.8075744910 | 9.27322 | 1 | — |
| 2 | succeeded | -0.5430599006 | 6.89313 | 1 | — |
| 3 | succeeded | -0.9047705213 | 5.15925 | 1 | — |
| 4 | succeeded | -1.6089267136 | 5.35362 | 1 | — |
| 5 | succeeded | -1.6335938919 | 5.54621 | 1 | — |
| 6 | succeeded | -1.8369810242 | 5.15147 | 1 | — |
| 7 | succeeded | -1.7924767083 | 4.80271 | 1 | — |
| 8 | succeeded | -1.8570522103 | 4.97768 | 1 | — |
| 9 | succeeded | -1.7646354791 | 5.7628 | 1 | — |
| 10 | succeeded | -1.8293584156 | 4.73974 | 1 | — |
| 11 | succeeded | -1.8032082031 | 6.28586 | 1 | — |
| 12 | succeeded | -1.7951606681 | 4.99692 | 1 | — |
| 13 | succeeded | -1.7806004918 | 5.23434 | 1 | — |
| 14 | succeeded | -1.8393918365 | 4.97398 | 1 | — |
| 15 | succeeded | -1.8046260724 | 5.83352 | 1 | — |
| 16 | succeeded | -1.8237043156 | 5.40862 | 1 | — |
| 17 | succeeded | -1.8258246031 | 5.23945 | 1 | — |
| 18 | succeeded | -1.8382601476 | 5.24141 | 1 | — |
| 19 | succeeded | -1.8309106865 | 5.27209 | 1 | — |