Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85712
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_kingston
Final energy-1.8399446479hartree
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
- 2026-02-11T16:17:02+01:00
- Wall time (s)
- 169
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
20 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 | -1.8279947141 | 11187.9 | 2 | — |
| 2 | succeeded | -0.5469470944 | 8.39339 | 1 | — |
| 3 | succeeded | -0.8618835050 | 9.09211 | 1 | — |
| 4 | succeeded | -1.6176224990 | 7.93333 | 1 | — |
| 5 | succeeded | -1.6604465226 | 8.64704 | 1 | — |
| 6 | succeeded | -1.8521720736 | 7.74392 | 1 | — |
| 7 | succeeded | -1.7994012431 | 9.51363 | 2 | — |
| 8 | succeeded | -1.8482176790 | 8.25429 | 1 | — |
| 9 | succeeded | -1.8534403362 | 7.34932 | 1 | — |
| 10 | succeeded | -1.8441093335 | 8.55665 | 1 | — |
| 11 | succeeded | -1.8404367751 | 7.22835 | 1 | — |
| 12 | succeeded | -1.8275069312 | 7.8634 | 1 | — |
| 13 | succeeded | -1.8433331980 | 9.35935 | 1 | — |
| 14 | succeeded | -1.8409332465 | 8.28894 | 1 | — |
| 15 | succeeded | -1.8484951709 | 8.0265 | 1 | — |
| 16 | succeeded | -1.8571150668 | 9.03945 | 1 | — |
| 17 | succeeded | -1.8396606396 | 7.8141 | 1 | — |
| 18 | succeeded | -1.8460908751 | 7.13604 | 1 | — |
| 19 | succeeded | -1.8518165202 | 7.58197 | 1 | — |
| 20 | succeeded | -1.8399446479 | 8.25558 | 1 | — |