Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.85281
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8393853200hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-09-25T15:02:36+02:00
- Wall time (s)
- 120
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 | -1.8062325111 | 1978.49 | 2 | — |
| 2 | succeeded | -0.5530954937 | 6.78223 | 2 | — |
| 3 | succeeded | -0.8777791448 | 5.89141 | 2 | — |
| 4 | succeeded | -1.5791126314 | 6.10523 | 2 | — |
| 5 | succeeded | -1.6622156010 | 6.25173 | 2 | — |
| 6 | succeeded | -1.8431987964 | 5.81285 | 2 | — |
| 7 | succeeded | -1.8216577453 | 5.4553 | 2 | — |
| 8 | succeeded | -1.8376964753 | 5.78474 | 2 | — |
| 9 | succeeded | -1.8410763368 | 5.68578 | 2 | — |
| 10 | succeeded | -1.8457461825 | 5.71984 | 2 | — |
| 11 | succeeded | -1.8273031567 | 6.54293 | 2 | — |
| 12 | succeeded | -1.8256793407 | 7.52314 | 2 | — |
| 13 | succeeded | -1.8314700144 | 5.48079 | 2 | — |
| 14 | succeeded | -1.8237693442 | 5.50594 | 2 | — |
| 15 | succeeded | -1.8528116353 | 5.94537 | 2 | — |
| 16 | succeeded | -1.8415034353 | 6.18667 | 2 | — |
| 17 | succeeded | -1.8370525693 | 5.6017 | 2 | — |
| 18 | succeeded | -1.8254647053 | 5.88879 | 2 | — |
| 19 | succeeded | -1.8386763853 | 5.77604 | 2 | — |
| 20 | succeeded | -1.8393853200 | 5.56797 | 2 | — |