Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84963
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8496268597hartree
Shots1024
Runtime executionsession
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
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-03-10T12:33:01+01:00
- Wall time (s)
- 401
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
26 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 | -1.8099744425 | 190.03 | 9 | — |
| 2 | succeeded | -0.6015650649 | 14.5495 | 9 | — |
| 3 | succeeded | -0.8657685266 | 14.9436 | 9 | — |
| 4 | succeeded | -1.2924445486 | 15.6982 | 9 | — |
| 5 | succeeded | -1.7808888444 | 14.9169 | 9 | — |
| 6 | succeeded | -1.7795164542 | 14.8625 | 9 | — |
| 7 | succeeded | -1.8349994826 | 15.1043 | 9 | — |
| 8 | succeeded | -1.7553868823 | 15.8006 | 9 | — |
| 9 | succeeded | -1.8207883432 | 15.3584 | 9 | — |
| 10 | succeeded | -1.8134519150 | 16.0011 | 9 | — |
| 11 | succeeded | -1.8020006248 | 14.8468 | 9 | — |
| 12 | succeeded | -1.8253909881 | 14.7311 | 9 | — |
| 13 | succeeded | -1.8354916097 | 15.2695 | 9 | — |
| 14 | succeeded | -1.8319599694 | 14.8843 | 9 | — |
| 15 | succeeded | -1.8262364965 | 15.4166 | 9 | — |
| 16 | succeeded | -1.8333019493 | 15.703 | 9 | — |
| 17 | succeeded | -1.8461645923 | 15.5652 | 9 | — |
| 18 | succeeded | -1.8036266130 | 15.0029 | 9 | — |
| 19 | succeeded | -1.8304770715 | 14.8929 | 9 | — |
| 20 | succeeded | -1.8406514104 | 14.7781 | 9 | — |
| 21 | succeeded | -1.8403002013 | 15.2044 | 9 | — |
| 22 | succeeded | -1.8496268597 | 14.8188 | 9 | — |
| 23 | succeeded | -1.8240468360 | 15.6465 | 9 | — |
| 24 | succeeded | -1.8263795867 | 15.2371 | 9 | — |
| 25 | succeeded | -1.8080059339 | 15.6766 | 9 | — |
| 26 | succeeded | -1.8217140853 | 15.4739 | 9 | — |