Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.86186
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8618564575hartree
Shots128
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_miami
- Resource type
- ibm quantum hardware
- Processor family
- Nighthawk r1
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 128
- Precision
- 0.0883883
- Resilience
- 0
- Submitted
- 2026-03-09T11:43:44+01:00
- Wall time (s)
- 192
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 | -1.8064428022 | 7.58496 | 2 | — |
| 2 | succeeded | -0.6425486012 | 8.22402 | 2 | — |
| 3 | succeeded | -0.9026545782 | 7.98215 | 2 | — |
| 4 | succeeded | -1.2835428165 | 8.31448 | 2 | — |
| 5 | succeeded | -1.6736235842 | 7.78213 | 2 | — |
| 6 | succeeded | -1.7713908577 | 7.32772 | 2 | — |
| 7 | succeeded | -1.8268045131 | 7.4099 | 2 | — |
| 8 | succeeded | -1.8217227740 | 7.49509 | 2 | — |
| 9 | succeeded | -1.8205780521 | 8.19148 | 2 | — |
| 10 | succeeded | -1.8115419185 | 7.88435 | 2 | — |
| 11 | succeeded | -1.8222777576 | 7.37089 | 2 | — |
| 12 | succeeded | -1.8087148685 | 7.97616 | 2 | — |
| 13 | succeeded | -1.8471488466 | 7.63923 | 2 | — |
| 14 | succeeded | -1.8528029466 | 7.85185 | 2 | — |
| 15 | succeeded | -1.7889255186 | 8.1903 | 2 | — |
| 16 | succeeded | -1.8618564575 | 8.08759 | 2 | — |
| 17 | succeeded | -1.8431944521 | 7.98658 | 2 | — |
| 18 | succeeded | -1.8290592021 | 7.692 | 2 | — |
| 19 | succeeded | -1.8375403521 | 7.49244 | 2 | — |
| 20 | succeeded | -1.7974066685 | 8.29483 | 2 | — |
| 21 | succeeded | -1.8375403521 | 8.65467 | 2 | — |
| 22 | succeeded | -1.8347133021 | 8.08882 | 2 | — |
| 23 | succeeded | -1.8307589076 | 7.78129 | 2 | — |
| 24 | succeeded | -1.8183233631 | 7.87531 | 2 | — |