Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.85903
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8590250632hartree
Shots512
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
- 512
- Precision
- 0.0441942
- Resilience
- 0
- Submitted
- 2026-03-09T11:50:02+01:00
- Wall time (s)
- 346
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 | -1.8344271217 | 10.8898 | 5 | — |
| 2 | succeeded | -0.5587474215 | 10.19 | 5 | — |
| 3 | succeeded | -0.8837150809 | 74.5456 | 5 | — |
| 4 | succeeded | -1.2725207970 | 38.1118 | 5 | — |
| 5 | succeeded | -1.7974240458 | 10.4429 | 5 | — |
| 6 | succeeded | -1.7586734770 | 10.9654 | 5 | — |
| 7 | succeeded | -1.8477168632 | 11.0582 | 5 | — |
| 8 | succeeded | -1.8061783433 | 12.9011 | 5 | — |
| 9 | succeeded | -1.8252435535 | 11.0925 | 5 | — |
| 10 | succeeded | -1.8341583185 | 12.3289 | 5 | — |
| 11 | succeeded | -1.8132329353 | 10.9186 | 5 | — |
| 12 | succeeded | -1.8212891590 | 10.7504 | 5 | — |
| 13 | succeeded | -1.8352813187 | 11.2128 | 5 | — |
| 14 | succeeded | -1.8559161771 | 10.7237 | 5 | — |
| 15 | succeeded | -1.8406535826 | 10.5776 | 5 | — |
| 16 | succeeded | -1.8590250632 | 11.2929 | 5 | — |
| 17 | succeeded | -1.8280749478 | 10.2423 | 5 | — |
| 18 | succeeded | -1.8095647213 | 10.8555 | 5 | — |
| 19 | succeeded | -1.8491303882 | 10.6569 | 5 | — |
| 20 | succeeded | -1.8136578617 | 10.2762 | 5 | — |
| 21 | succeeded | -1.8078650158 | 11.5712 | 5 | — |
| 22 | succeeded | -1.8265226769 | 10.9747 | 5 | — |
| 23 | succeeded | -1.8417852714 | 11.2329 | 5 | — |