Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.87319
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8661757343hartree
Shots1024
Runtime executionsession
Resilience1
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
- 1
- Submitted
- 2025-09-26T19:18:37+02:00
- Wall time (s)
- 350
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
21 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 | -1.8441407996 | 1603.44 | 18 | — |
| 2 | succeeded | -0.5447074672 | 16.1508 | 12 | — |
| 3 | succeeded | -0.9132676484 | 16.3555 | 12 | — |
| 4 | succeeded | -1.6582344831 | 16.6016 | 12 | — |
| 5 | succeeded | -1.6367496203 | 16.3835 | 12 | — |
| 6 | succeeded | -1.8550519705 | 15.9019 | 11 | — |
| 7 | succeeded | -1.8237080725 | 15.9499 | 11 | — |
| 8 | succeeded | -1.8635322787 | 15.8207 | 11 | — |
| 9 | succeeded | -1.8169447205 | 15.9405 | 11 | — |
| 10 | succeeded | -1.8549848331 | 16.3685 | 12 | — |
| 11 | succeeded | -1.8478997656 | 17.102 | 12 | — |
| 12 | succeeded | -1.8572639644 | 16.7589 | 12 | — |
| 13 | succeeded | -1.8617575389 | 16.3387 | 11 | — |
| 14 | succeeded | -1.8679407189 | 16.5746 | 11 | — |
| 15 | succeeded | -1.8647865613 | 16.1159 | 12 | — |
| 16 | succeeded | -1.8519700548 | 16.1449 | 11 | — |
| 17 | succeeded | -1.8583523694 | 16.3443 | 11 | — |
| 18 | succeeded | -1.8731889783 | 16.0674 | 12 | — |
| 19 | succeeded | -1.8356901569 | 15.9684 | 11 | — |
| 20 | succeeded | -1.8455490550 | 16.355 | 12 | — |
| 21 | succeeded | -1.8661757343 | 16.6159 | 11 | — |