Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.82658
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.7986705868hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-11-25T13:40:06+01:00
- Wall time (s)
- 103
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
17 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 | -1.8265833612 | 7.68603 | 1 | — |
| 2 | succeeded | -0.5824196209 | 6.35202 | 2 | — |
| 3 | succeeded | -0.9052648206 | 5.472 | 1 | — |
| 4 | succeeded | -1.6222836560 | 5.66272 | 1 | — |
| 5 | succeeded | -1.6473042156 | 5.88095 | 1 | — |
| 6 | succeeded | -1.8166280019 | 4.87557 | 1 | — |
| 7 | succeeded | -1.8086302904 | 5.76017 | 1 | — |
| 8 | succeeded | -1.8157738049 | 5.01918 | 1 | — |
| 9 | succeeded | -1.8032601987 | 5.04189 | 1 | — |
| 10 | succeeded | -1.8069371015 | 5.27429 | 1 | — |
| 11 | succeeded | -1.8208577161 | 7.40026 | 3 | — |
| 12 | succeeded | -1.8041837688 | 8.17036 | 4 | — |
| 13 | succeeded | -1.8240381474 | 5.66798 | 2 | — |
| 14 | succeeded | -1.8159819237 | 5.54535 | 1 | — |
| 15 | succeeded | -1.8048883591 | 7.6234 | 3 | — |
| 16 | succeeded | -1.8036179243 | 6.16157 | 2 | — |
| 17 | succeeded | -1.7986705868 | 6.87416 | 2 | — |