Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 25
- Best energy (Ha)
- -1.83513
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8287540834hartree
Shots4096
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
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2025-11-24T13:14:48+01:00
- Wall time (s)
- 141
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
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 | -1.8147982052 | 9.50873 | 3 | — |
| 2 | succeeded | -0.5744333133 | 7.17606 | 3 | — |
| 3 | succeeded | -0.8856055620 | 7.4185 | 3 | — |
| 4 | succeeded | -1.5973426510 | 10.0873 | 4 | — |
| 5 | succeeded | -1.6208407387 | 8.41083 | 3 | — |
| 6 | succeeded | -1.8341892037 | 9.615 | 5 | — |
| 7 | succeeded | -1.7960105208 | 6.46185 | 3 | — |
| 8 | succeeded | -1.8351317461 | 8.46226 | 4 | — |
| 9 | succeeded | -1.8118346155 | 7.49833 | 3 | — |
| 10 | succeeded | -1.8296369935 | 7.88927 | 3 | — |
| 11 | succeeded | -1.8147115230 | 10.662 | 6 | — |
| 12 | succeeded | -1.8293372710 | 6.98653 | 3 | — |
| 13 | succeeded | -1.8195509998 | 7.41138 | 3 | — |
| 14 | succeeded | -1.8295307619 | 6.72406 | 3 | — |
| 15 | succeeded | -1.8111245947 | 6.90402 | 3 | — |
| 16 | succeeded | -1.8317052512 | 6.80887 | 3 | — |
| 17 | succeeded | -1.8332781236 | 6.84906 | 3 | — |
| 18 | succeeded | -1.8287540834 | 7.38604 | 3 | — |