Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84355
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8435456612hartree
Shots1024
Runtime executionsession
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
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-03-09T13:06:40+01:00
- Wall time (s)
- 392
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 | -1.8065837202 | 23.4358 | 9 | — |
| 2 | succeeded | -0.5974675801 | 15.1718 | 9 | — |
| 3 | succeeded | -0.8423803355 | 14.9296 | 9 | — |
| 4 | succeeded | -1.3243138897 | 14.789 | 9 | — |
| 5 | succeeded | -1.7934674791 | 14.8977 | 9 | — |
| 6 | succeeded | -1.7587406778 | 14.7041 | 9 | — |
| 7 | succeeded | -1.8304770715 | 14.4286 | 9 | — |
| 8 | succeeded | -1.8186854330 | 14.7975 | 9 | — |
| 9 | succeeded | -1.8395890945 | 30.9785 | 9 | — |
| 10 | succeeded | -1.8012830015 | 17.4067 | 9 | — |
| 11 | succeeded | -1.8342927201 | 14.7786 | 9 | — |
| 12 | succeeded | -1.8243243278 | 15.8921 | 9 | — |
| 13 | succeeded | -1.8417093820 | 14.8111 | 9 | — |
| 14 | succeeded | -1.8206539416 | 17.8648 | 9 | — |
| 15 | succeeded | -1.8318168792 | 16.5875 | 9 | — |
| 16 | succeeded | -1.8304770715 | 14.8469 | 9 | — |
| 17 | succeeded | -1.8285649028 | 15.5335 | 9 | — |
| 18 | succeeded | -1.8340065396 | 14.6132 | 9 | — |
| 19 | succeeded | -1.8141499889 | 14.7587 | 9 | — |
| 20 | succeeded | -1.8305464444 | 15.9738 | 9 | — |
| 21 | succeeded | -1.8435456612 | 16.0169 | 9 | — |
| 22 | succeeded | -1.8111104757 | 14.8381 | 9 | — |
| 23 | succeeded | -1.8403674021 | 15.3592 | 9 | — |
| 24 | succeeded | -1.8369766799 | 16.4615 | 9 | — |