Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.59529
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.5755103448hartree
Shots1024
Runtime executionsession
Resilience0
MappingJW
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
- 2025-09-26T17:19:45+02:00
- Wall time (s)
- 154
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
- 4
- Physical qubits
- —
- Parameters
- —
- Depth
- 96
- Two-qubit gates
- 48
- 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
23 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 | -1.5305562468 | 1149.83 | 3 | — |
| 2 | succeeded | -0.7498187954 | 6.45489 | 3 | — |
| 3 | succeeded | -0.8824560580 | 7.28591 | 3 | — |
| 4 | succeeded | -1.3836532877 | 6.59605 | 3 | — |
| 5 | succeeded | -1.4485960804 | 7.25948 | 4 | — |
| 6 | succeeded | -1.5603979532 | 6.37119 | 3 | — |
| 7 | succeeded | -1.5356383921 | 6.13752 | 3 | — |
| 8 | succeeded | -1.5579161580 | 6.30684 | 3 | — |
| 9 | succeeded | -1.5606900656 | 6.98342 | 3 | — |
| 10 | succeeded | -1.5480353161 | 6.17138 | 3 | — |
| 11 | succeeded | -1.5757323549 | 6.3613 | 3 | — |
| 12 | succeeded | -1.5850982106 | 7.21579 | 3 | — |
| 13 | succeeded | -1.5682441470 | 6.39052 | 3 | — |
| 14 | succeeded | -1.5642653788 | 7.17381 | 3 | — |
| 15 | succeeded | -1.5907547670 | 6.46265 | 3 | — |
| 16 | succeeded | -1.5762818641 | 6.53331 | 3 | — |
| 17 | succeeded | -1.5758111343 | 6.64313 | 3 | — |
| 18 | succeeded | -1.5764765458 | 6.20777 | 3 | — |
| 19 | succeeded | -1.5856839806 | 6.74512 | 3 | — |
| 20 | succeeded | -1.5552001307 | 6.48234 | 3 | — |
| 21 | succeeded | -1.5736414515 | 6.68355 | 3 | — |
| 22 | succeeded | -1.5952878596 | 6.86854 | 3 | — |
| 23 | succeeded | -1.5755103448 | 6.53106 | 3 | — |