Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84306
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8430578784hartree
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
- 2026-03-09T22:12:19+01:00
- Wall time (s)
- 895
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
23 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 | -1.8216360237 | 351.511 | 10 | — |
| 2 | succeeded | -0.6144970809 | 14.9864 | 10 | — |
| 3 | succeeded | -0.8392020764 | 119.578 | 10 | — |
| 4 | succeeded | -1.3192256341 | 116.802 | 10 | — |
| 5 | succeeded | -1.8079539382 | 17.0182 | 10 | — |
| 6 | succeeded | -1.7795858272 | 15.6746 | 10 | — |
| 7 | succeeded | -1.8361289993 | 14.7944 | 10 | — |
| 8 | succeeded | -1.8037090189 | 14.5648 | 10 | — |
| 9 | succeeded | -1.8246061640 | 15.2072 | 10 | — |
| 10 | succeeded | -1.8419283617 | 14.8856 | 10 | — |
| 11 | succeeded | -1.8251850414 | 15.1102 | 10 | — |
| 12 | succeeded | -1.8272966402 | 14.9848 | 10 | — |
| 13 | succeeded | -1.8430578784 | 15.3802 | 10 | — |
| 14 | succeeded | -1.8382536311 | 15.3063 | 10 | — |
| 15 | succeeded | -1.8340130561 | 15.2914 | 10 | — |
| 16 | succeeded | -1.8217899748 | 15.6711 | 10 | — |
| 17 | succeeded | -1.8311166332 | 15.1427 | 10 | — |
| 18 | succeeded | -1.8216468845 | 14.925 | 10 | — |
| 19 | succeeded | -1.8243330165 | 15.6267 | 10 | — |
| 20 | succeeded | -1.8222127290 | 15.1398 | 10 | — |
| 21 | succeeded | -1.8245454796 | 15.2427 | 10 | — |
| 22 | succeeded | -1.8321746047 | 15.6469 | 10 | — |
| 23 | succeeded | -1.8218615199 | 15.0684 | 10 | — |