Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84508
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8345566699hartree
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
- 2025-09-19T13:46:22+02:00
- Wall time (s)
- 182
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
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 | -1.8232793551 | 16.7504 | 9 | — |
| 2 | succeeded | -0.5684990063 | 8.67488 | 4 | — |
| 3 | succeeded | -0.8862234361 | 7.91092 | 4 | — |
| 4 | succeeded | -1.6047083693 | 7.32954 | 4 | — |
| 5 | succeeded | -1.6539799715 | 7.36004 | 4 | — |
| 6 | succeeded | -1.8334298684 | 7.65027 | 4 | — |
| 7 | succeeded | -1.7971584669 | 7.0092 | 4 | — |
| 8 | succeeded | -1.8269709200 | 7.35064 | 4 | — |
| 9 | succeeded | -1.8340282272 | 7.46953 | 4 | — |
| 10 | succeeded | -1.8309339691 | 8.23913 | 4 | — |
| 11 | succeeded | -1.8344162949 | 7.13328 | 4 | — |
| 12 | succeeded | -1.8278597694 | 8.31056 | 4 | — |
| 13 | succeeded | -1.8393788035 | 7.90222 | 4 | — |
| 14 | succeeded | -1.8308635101 | 7.43884 | 4 | — |
| 15 | succeeded | -1.8334070948 | 7.82899 | 4 | — |
| 16 | succeeded | -1.8350867418 | 8.10208 | 4 | — |
| 17 | succeeded | -1.8294678713 | 7.44265 | 4 | — |
| 18 | succeeded | -1.8374877794 | 6.9712 | 4 | — |
| 19 | succeeded | -1.8313756957 | 7.65968 | 4 | — |
| 20 | succeeded | -1.8355799550 | 7.36644 | 4 | — |
| 21 | succeeded | -1.8400844799 | 7.29342 | 4 | — |
| 22 | succeeded | -1.8450849332 | 7.38529 | 4 | — |
| 23 | succeeded | -1.8345566699 | 7.54143 | 4 | — |