Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.83828
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8243221897hartree
Shots4096
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_aachen
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2025-09-19T15:52:25+02:00
- Wall time (s)
- 155
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 | -1.8213715308 | 17.0835 | 11 | — |
| 2 | succeeded | -0.5714480020 | 9.07553 | 4 | — |
| 3 | succeeded | -0.8913816077 | 8.11858 | 4 | — |
| 4 | succeeded | -1.6302331050 | 7.7106 | 4 | — |
| 5 | succeeded | -1.6442652454 | 7.62008 | 4 | — |
| 6 | succeeded | -1.8263465293 | 7.32124 | 4 | — |
| 7 | succeeded | -1.8372704629 | 7.30745 | 4 | — |
| 8 | succeeded | -1.8006570498 | 7.37279 | 4 | — |
| 9 | succeeded | -1.8156686934 | 7.98165 | 4 | — |
| 10 | succeeded | -1.8272879856 | 7.7487 | 4 | — |
| 11 | succeeded | -1.8382785769 | 7.8247 | 4 | — |
| 12 | succeeded | -1.8271134672 | 7.62982 | 4 | — |
| 13 | succeeded | -1.8251340977 | 7.42417 | 4 | — |
| 14 | succeeded | -1.8068693917 | 7.53134 | 4 | — |
| 15 | succeeded | -1.8249937227 | 7.67592 | 4 | — |
| 16 | succeeded | -1.8261411257 | 8.05608 | 4 | — |
| 17 | succeeded | -1.8284733333 | 7.2522 | 4 | — |
| 18 | succeeded | -1.8269205194 | 7.73874 | 4 | — |
| 19 | succeeded | -1.8243221897 | 7.54622 | 4 | — |