Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.89916
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8991630911hartree
Shots64
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
- 64
- Precision
- 0.125
- Resilience
- 0
- Submitted
- 2026-03-09T11:35:53+01:00
- Wall time (s)
- 469
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 | -1.8256597912 | 7.71128 | 2 | — |
| 2 | succeeded | -0.6148504621 | 11.7347 | 2 | — |
| 3 | succeeded | -0.7404201384 | 144.04 | 2 | — |
| 4 | succeeded | -1.3474202446 | 8.29304 | 2 | — |
| 5 | succeeded | -1.7115025787 | 9.01665 | 2 | — |
| 6 | succeeded | -1.8086974912 | 141.26 | 2 | — |
| 7 | succeeded | -1.8629838021 | 8.67571 | 2 | — |
| 8 | succeeded | -1.6900309006 | 8.24635 | 2 | — |
| 9 | succeeded | -1.8200056912 | 7.6748 | 2 | — |
| 10 | succeeded | -1.8302039240 | 8.44893 | 2 | — |
| 11 | succeeded | -1.8573297021 | 7.73753 | 2 | — |
| 12 | succeeded | -1.8516756021 | 7.57237 | 2 | — |
| 13 | succeeded | -1.8324586130 | 8.02351 | 2 | — |
| 14 | succeeded | -1.8686379021 | 8.07821 | 2 | — |
| 15 | succeeded | -1.8856002021 | 7.89057 | 2 | — |
| 16 | succeeded | -1.8573297021 | 8.34604 | 2 | — |
| 17 | succeeded | -1.8742920021 | 7.79183 | 2 | — |
| 18 | succeeded | -1.8211504131 | 8.22468 | 2 | — |
| 19 | succeeded | -1.8991630911 | 8.19155 | 2 | — |
| 20 | succeeded | -1.8708925912 | 7.95809 | 2 | — |
| 21 | succeeded | -1.8482761912 | 7.40469 | 2 | — |
| 22 | succeeded | -1.8268045131 | 8.11269 | 2 | — |
| 23 | succeeded | -1.8765466912 | 8.64721 | 2 | — |
| 24 | succeeded | -1.8211504131 | 7.51761 | 2 | — |