Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84122
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_kingston
Final energy-1.8412194270hartree
Shots1024
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_kingston
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-03-31T22:54:59+02:00
- Wall time (s)
- 278
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 | -1.8157000876 | 23.5123 | 2 | — |
| 2 | succeeded | -0.6060159309 | 13.5176 | 1 | — |
| 3 | succeeded | -0.8425234257 | 12.7806 | 1 | — |
| 4 | succeeded | -1.3084139056 | 10.8389 | 1 | — |
| 5 | succeeded | -1.8008863132 | 12.7494 | 1 | — |
| 6 | succeeded | -1.7836139390 | 11.5486 | 1 | — |
| 7 | succeeded | -1.8201618144 | 10.1861 | 1 | — |
| 8 | succeeded | -1.8067463599 | 11.9688 | 1 | — |
| 9 | succeeded | -1.8146421160 | 12.31 | 1 | — |
| 10 | succeeded | -1.8337290478 | 11.0776 | 1 | — |
| 11 | succeeded | -1.8189672691 | 10.3281 | 1 | — |
| 12 | succeeded | -1.8290613743 | 10.4284 | 1 | — |
| 13 | succeeded | -1.8272272673 | 10.9405 | 1 | — |
| 14 | succeeded | -1.8340802569 | 9.33655 | 1 | — |
| 15 | succeeded | -1.8412194270 | 7.89833 | 1 | — |
| 16 | succeeded | -1.8405083202 | 7.92152 | 1 | — |
| 17 | succeeded | -1.8395240659 | 8.29435 | 1 | — |
| 18 | succeeded | -1.8336553305 | 11.7939 | 2 | — |
| 19 | succeeded | -1.8202333595 | 10.6251 | 1 | — |
| 20 | succeeded | -1.8282874110 | 9.94213 | 1 | — |
| 21 | succeeded | -1.8304770715 | 8.43125 | 1 | — |
| 22 | succeeded | -1.8212197860 | 8.56094 | 1 | — |
| 23 | succeeded | -1.8343620930 | 8.21481 | 1 | — |
| 24 | succeeded | -1.8349301096 | 10.1194 | 1 | — |
| 25 | succeeded | -1.8385332951 | 10.7178 | 1 | — |
| 26 | succeeded | -1.8280727757 | 10.008 | 1 | — |