Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84574
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8291004051hartree
Shots2048
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
- 2048
- Precision
- 0.0220971
- Resilience
- 0
- Submitted
- 2025-11-25T11:47:05+01:00
- Wall time (s)
- 112
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 | -1.8161943869 | 8.15785 | 2 | — |
| 2 | succeeded | -0.5721726508 | 6.44454 | 2 | — |
| 3 | succeeded | -0.9007434956 | 6.35107 | 2 | — |
| 4 | succeeded | -1.5704580491 | 7.43688 | 4 | — |
| 5 | succeeded | -1.6452186145 | 7.50527 | 3 | — |
| 6 | succeeded | -1.8389593075 | 6.2032 | 2 | — |
| 7 | succeeded | -1.8046315028 | 5.3664 | 2 | — |
| 8 | succeeded | -1.8216534010 | 5.35078 | 2 | — |
| 9 | succeeded | -1.8288521694 | 6.10233 | 2 | — |
| 10 | succeeded | -1.8358157349 | 5.34102 | 2 | — |
| 11 | succeeded | -1.8457407521 | 5.22066 | 2 | — |
| 12 | succeeded | -1.8314667562 | 5.99778 | 2 | — |
| 13 | succeeded | -1.8346471874 | 5.80299 | 2 | — |
| 14 | succeeded | -1.8303372395 | 5.2207 | 2 | — |
| 15 | succeeded | -1.8451066208 | 5.81009 | 2 | — |
| 16 | succeeded | -1.8370850836 | 5.22847 | 2 | — |
| 17 | succeeded | -1.8328813672 | 5.40759 | 2 | — |
| 18 | succeeded | -1.8380379097 | 5.36065 | 2 | — |
| 19 | succeeded | -1.8291004051 | 5.50317 | 2 | — |