Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84228
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8422784847hartree
Shots4096
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
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-03-09T12:20:35+01:00
- Wall time (s)
- 987
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 | -1.8178198321 | 67.1533 | 34 | — |
| 2 | succeeded | -0.5776842036 | 39.9026 | 34 | — |
| 3 | succeeded | -0.8643376584 | 40.3665 | 34 | — |
| 4 | succeeded | -1.2990189603 | 39.3257 | 34 | — |
| 5 | succeeded | -1.7931677567 | 39.884 | 34 | — |
| 6 | succeeded | -1.7649925935 | 40.0381 | 34 | — |
| 7 | succeeded | -1.8292413232 | 40.5081 | 34 | — |
| 8 | succeeded | -1.8065523260 | 39.8932 | 34 | — |
| 9 | succeeded | -1.8288304818 | 39.7827 | 34 | — |
| 10 | succeeded | -1.8194745673 | 40.653 | 34 | — |
| 11 | succeeded | -1.8323133507 | 39.5776 | 34 | — |
| 12 | succeeded | -1.8217471427 | 39.628 | 34 | — |
| 13 | succeeded | -1.8336390734 | 39.2421 | 34 | — |
| 14 | succeeded | -1.8334640119 | 39.2183 | 34 | — |
| 15 | succeeded | -1.8294689574 | 39.8975 | 34 | — |
| 16 | succeeded | -1.8258142853 | 39.2929 | 34 | — |
| 17 | succeeded | -1.8237996863 | 40.4109 | 34 | — |
| 18 | succeeded | -1.8301773490 | 39.5759 | 34 | — |
| 19 | succeeded | -1.8258836582 | 39.9466 | 34 | — |
| 20 | succeeded | -1.8331458601 | 40.2425 | 34 | — |
| 21 | succeeded | -1.8264495027 | 39.9358 | 34 | — |
| 22 | succeeded | -1.8422784847 | 39.6596 | 34 | — |
| 23 | succeeded | -1.8323317800 | 40.5206 | 34 | — |
| 24 | succeeded | -1.8209558362 | 39.6611 | 34 | — |