Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84807
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8480697015hartree
Shots4096
Runtime executionsingle-job
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
- single-job
- Shots
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-03-09T22:12:57+01:00
- Wall time (s)
- 202
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
26 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 | -1.8202046125 | 7.2121 | 4 | — |
| 2 | succeeded | -0.5605842438 | 7.52892 | 4 | — |
| 3 | succeeded | -0.8747244605 | 7.87697 | 4 | — |
| 4 | succeeded | -1.3170522308 | 7.42532 | 4 | — |
| 5 | succeeded | -1.8010098880 | 7.23551 | 4 | — |
| 6 | succeeded | -1.7747626076 | 7.90087 | 4 | — |
| 7 | succeeded | -1.8368184185 | 8.31829 | 4 | — |
| 8 | succeeded | -1.8268836607 | 7.55713 | 4 | — |
| 9 | succeeded | -1.8386687827 | 7.0643 | 4 | — |
| 10 | succeeded | -1.8256809357 | 7.39079 | 4 | — |
| 11 | succeeded | -1.8357544735 | 7.70108 | 4 | — |
| 12 | succeeded | -1.8349235931 | 7.73491 | 4 | — |
| 13 | succeeded | -1.8415494916 | 7.29918 | 4 | — |
| 14 | succeeded | -1.8431944521 | 7.19852 | 4 | — |
| 15 | succeeded | -1.8405814944 | 7.99081 | 4 | — |
| 16 | succeeded | -1.8345886412 | 12.2962 | 8 | — |
| 17 | succeeded | -1.8480697015 | 7.82957 | 4 | — |
| 18 | succeeded | -1.8408801308 | 7.32141 | 4 | — |
| 19 | succeeded | -1.8343078912 | 7.29445 | 4 | — |
| 20 | succeeded | -1.8401917976 | 7.36774 | 4 | — |
| 21 | succeeded | -1.8438491849 | 7.49178 | 4 | — |
| 22 | succeeded | -1.8359875382 | 7.69946 | 4 | — |
| 23 | succeeded | -1.8381414261 | 8.34473 | 4 | — |
| 24 | succeeded | -1.8366043262 | 7.16184 | 4 | — |
| 25 | succeeded | -1.8373820908 | 7.88149 | 4 | — |
| 26 | succeeded | -1.8437071807 | 7.29368 | 4 | — |