Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.96136
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.9613581911hartree
Shots32
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
- 32
- Precision
- 0.176777
- Resilience
- 0
- Submitted
- 2026-03-09T21:56:58+01:00
- Wall time (s)
- 156
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
24 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 | -1.8256597912 | 5.29531 | 1 | — |
| 2 | succeeded | -0.5119666950 | 5.7572 | 2 | — |
| 3 | succeeded | -1.0117474289 | 5.61389 | 1 | — |
| 4 | succeeded | -1.4299423009 | 4.93681 | 2 | — |
| 5 | succeeded | -1.8166410349 | 4.9297 | 2 | — |
| 6 | succeeded | -1.7691187913 | 5.18911 | 2 | — |
| 7 | succeeded | -1.8776914130 | 5.51369 | 1 | — |
| 8 | succeeded | -1.8505656349 | 33.6443 | 9 | — |
| 9 | succeeded | -1.8595843912 | 5.94761 | 2 | — |
| 10 | succeeded | -1.9161253911 | 4.93084 | 2 | — |
| 11 | succeeded | -1.9613581911 | 5.81254 | 2 | — |
| 12 | succeeded | -1.5679301444 | 5.27253 | 1 | — |
| 13 | succeeded | -1.6447981006 | 5.40382 | 2 | — |
| 14 | succeeded | -1.7736976786 | 4.75652 | 1 | — |
| 15 | succeeded | -1.8550750130 | 4.93184 | 1 | — |
| 16 | succeeded | -1.8053328349 | 5.01842 | 2 | — |
| 17 | succeeded | -1.8279492349 | 4.93382 | 1 | — |
| 18 | succeeded | -1.7895152568 | 5.43236 | 2 | — |
| 19 | succeeded | -1.8166410349 | 5.53748 | 2 | — |
| 20 | succeeded | -1.7850058786 | 4.75289 | 1 | — |
| 21 | succeeded | -1.8618738348 | 4.87733 | 1 | — |
| 22 | succeeded | -1.7782070568 | 6.03117 | 2 | — |
| 23 | succeeded | -1.8663832130 | 5.59903 | 2 | — |
| 24 | succeeded | -1.8550750130 | 4.7967 | 1 | — |