Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.76782
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.7286339667hartree
Shots2048
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
- 2048
- Precision
- 0.0220971
- Resilience
- 0
- Submitted
- 2025-12-01T11:49:57+01:00
- Wall time (s)
- 145
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 | -1.7423930278 | 14.2554 | 3 | — |
| 2 | succeeded | -0.6006859561 | 6.7057 | 2 | — |
| 3 | succeeded | -0.8846657348 | 6.98906 | 2 | — |
| 4 | succeeded | -1.5859623628 | 6.608 | 2 | — |
| 5 | succeeded | -1.6050524166 | 6.28005 | 2 | — |
| 6 | succeeded | -1.7577727147 | 6.57357 | 2 | — |
| 7 | succeeded | -1.7389904267 | 6.88673 | 2 | — |
| 8 | succeeded | -1.7661866639 | 7.95785 | 3 | — |
| 9 | succeeded | -1.7524850289 | 7.37178 | 2 | — |
| 10 | succeeded | -1.7678169964 | 7.16502 | 2 | — |
| 11 | succeeded | -1.7425578396 | 7.07967 | 2 | — |
| 12 | succeeded | -1.7484937757 | 7.24131 | 2 | — |
| 13 | succeeded | -1.7487723536 | 6.56422 | 2 | — |
| 14 | succeeded | -1.7428743622 | 6.94426 | 2 | — |
| 15 | succeeded | -1.7444266331 | 6.45263 | 2 | — |
| 16 | succeeded | -1.7538952957 | 7.20551 | 2 | — |
| 17 | succeeded | -1.7377145615 | 6.7384 | 2 | — |
| 18 | succeeded | -1.7281060670 | 7.20794 | 2 | — |
| 19 | succeeded | -1.7486314356 | 7.0181 | 2 | — |
| 20 | succeeded | -1.7286339667 | 6.86656 | 3 | — |