Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.85119
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8511856471hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-03-09T11:55:51+01:00
- Wall time (s)
- 472
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
25 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 | -1.8208577161 | 15.5624 | 9 | — |
| 2 | succeeded | -0.5321809713 | 15.4616 | 9 | — |
| 3 | succeeded | -0.8620244231 | 14.3793 | 10 | — |
| 4 | succeeded | -1.3296839814 | 14.7059 | 9 | — |
| 5 | succeeded | -1.8220848439 | 14.4722 | 9 | — |
| 6 | succeeded | -1.7611819003 | 14.748 | 9 | — |
| 7 | succeeded | -1.8287145095 | 15.2911 | 9 | — |
| 8 | succeeded | -1.8232641841 | 14.5412 | 9 | — |
| 9 | succeeded | -1.8194659127 | 14.7013 | 9 | — |
| 10 | succeeded | -1.8121793081 | 98.325 | 9 | — |
| 11 | succeeded | -1.8177640351 | 14.3928 | 9 | — |
| 12 | succeeded | -1.8282917553 | 14.5864 | 9 | — |
| 13 | succeeded | -1.8169857275 | 14.7431 | 9 | — |
| 14 | succeeded | -1.8294928171 | 14.8299 | 10 | — |
| 15 | succeeded | -1.8314721866 | 14.5275 | 9 | — |
| 16 | succeeded | -1.8289985178 | 15.1718 | 10 | — |
| 17 | succeeded | -1.8511856471 | 14.3235 | 9 | — |
| 18 | succeeded | -1.8301995796 | 15.8362 | 9 | — |
| 19 | succeeded | -1.8190366420 | 14.4856 | 9 | — |
| 20 | succeeded | -1.8471575353 | 18.5356 | 9 | — |
| 21 | succeeded | -1.8325995311 | 21.2157 | 9 | — |
| 22 | succeeded | -1.8348650810 | 14.5007 | 9 | — |
| 23 | succeeded | -1.8057490726 | 21.7067 | 9 | — |
| 24 | succeeded | -1.8304835879 | 14.4388 | 9 | — |
| 25 | succeeded | -1.8439099033 | 14.9497 | 9 | — |