Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85521
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8318949408hartree
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
- 2025-12-30T17:31:57+01:00
- Wall time (s)
- 124
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
20 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 | -1.8062303390 | 7.90857 | 1 | — |
| 2 | succeeded | -0.5891295203 | 6.28754 | 1 | — |
| 3 | succeeded | -0.8855535323 | 5.76957 | 1 | — |
| 4 | succeeded | -1.5798193939 | 5.44445 | 1 | — |
| 5 | succeeded | -1.6622090845 | 5.92117 | 1 | — |
| 6 | succeeded | -1.8346482735 | 5.21027 | 1 | — |
| 7 | succeeded | -1.8234961967 | 5.16696 | 1 | — |
| 8 | succeeded | -1.8081555406 | 5.07813 | 1 | — |
| 9 | succeeded | -1.8338677937 | 5.07655 | 1 | — |
| 10 | succeeded | -1.8468756992 | 5.31677 | 1 | — |
| 11 | succeeded | -1.8427782144 | 5.20217 | 1 | — |
| 12 | succeeded | -1.8320358588 | 5.37918 | 1 | — |
| 13 | succeeded | -1.8132437961 | 5.17387 | 1 | — |
| 14 | succeeded | -1.8211547574 | 5.82389 | 1 | — |
| 15 | succeeded | -1.8139462143 | 6.02283 | 1 | — |
| 16 | succeeded | -1.8146529768 | 10.1319 | 4 | — |
| 17 | succeeded | -1.8552137589 | 7.5055 | 2 | — |
| 18 | succeeded | -1.8197412324 | 8.74732 | 2 | — |
| 19 | succeeded | -1.8307632519 | 8.4555 | 3 | — |
| 20 | succeeded | -1.8318949408 | 6.01772 | 2 | — |