Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.8644
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8643973271hartree
Shots512
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
- 512
- Precision
- 0.0441942
- Resilience
- 0
- Submitted
- 2026-03-09T22:05:39+01:00
- Wall time (s)
- 139
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 | -1.8178897480 | 6.14234 | 2 | — |
| 2 | succeeded | -0.5802277883 | 5.51078 | 2 | — |
| 3 | succeeded | -0.9140971797 | 7.13091 | 3 | — |
| 4 | succeeded | -1.2947079263 | 6.41223 | 2 | — |
| 5 | succeeded | -1.7971422097 | 5.31101 | 2 | — |
| 6 | succeeded | -1.7664435202 | 5.34629 | 2 | — |
| 7 | succeeded | -1.8460215021 | 5.38736 | 2 | — |
| 8 | succeeded | -1.8174865433 | 5.94032 | 2 | — |
| 9 | succeeded | -1.8403674021 | 6.20598 | 2 | — |
| 10 | succeeded | -1.8361311714 | 5.8886 | 2 | — |
| 11 | succeeded | -1.8502620771 | 6.24639 | 2 | — |
| 12 | succeeded | -1.8186051992 | 6.05287 | 2 | — |
| 13 | succeeded | -1.8227026840 | 5.91637 | 2 | — |
| 14 | succeeded | -1.8444692312 | 6.28646 | 2 | — |
| 15 | succeeded | -1.8270820049 | 6.26213 | 2 | — |
| 16 | succeeded | -1.8539346355 | 5.54238 | 2 | — |
| 17 | succeeded | -1.8564798494 | 5.84468 | 2 | — |
| 18 | succeeded | -1.8488485521 | 6.13127 | 2 | — |
| 19 | succeeded | -1.8205823965 | 5.08793 | 2 | — |
| 20 | succeeded | -1.8463076826 | 5.53769 | 2 | — |
| 21 | succeeded | -1.8643973271 | 5.74135 | 2 | — |
| 22 | succeeded | -1.8436193785 | 6.37279 | 3 | — |
| 23 | succeeded | -1.8135191158 | 7.22611 | 3 | — |