Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.88335
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8833455130hartree
Shots64
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_pittsburgh
- Resource type
- ibm quantum hardware
- Processor family
- Heron r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 64
- Precision
- 0.125
- Resilience
- 0
- Submitted
- 2026-03-02T23:53:34+01:00
- Wall time (s)
- 220
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 | -1.7838264022 | 8.96141 | 1 | — |
| 2 | succeeded | -0.5922340621 | 8.3855 | 1 | — |
| 3 | succeeded | -0.7765994274 | 8.50578 | 1 | — |
| 4 | succeeded | -1.2174106994 | 8.74529 | 1 | — |
| 5 | succeeded | -1.8562197349 | 10.1069 | 1 | — |
| 6 | succeeded | -1.4865528100 | 8.93342 | 1 | — |
| 7 | succeeded | -1.8494209130 | 8.29219 | 1 | — |
| 8 | succeeded | -1.8483109458 | 8.67479 | 1 | — |
| 9 | succeeded | -1.8188957240 | 8.94304 | 1 | — |
| 10 | succeeded | -1.8449115349 | 8.53835 | 1 | — |
| 11 | succeeded | -1.8381127130 | 9.00133 | 1 | — |
| 12 | succeeded | -1.7149019896 | 8.268 | 1 | — |
| 13 | succeeded | -1.7533359677 | 8.68637 | 1 | — |
| 14 | succeeded | -1.8075875240 | 9.36573 | 1 | — |
| 15 | succeeded | -1.7861158459 | 9.10262 | 1 | — |
| 16 | succeeded | -1.8629838021 | 8.47279 | 1 | — |
| 17 | succeeded | -1.8776914130 | 9.64477 | 1 | — |
| 18 | succeeded | -1.8584744239 | 9.40201 | 1 | — |
| 19 | succeeded | -1.7442824568 | 9.5943 | 1 | — |
| 20 | succeeded | -1.7397730787 | 8.75258 | 1 | — |
| 21 | succeeded | -1.8833455130 | 10.1257 | 1 | — |
| 22 | succeeded | -1.8528203239 | 19.8418 | 1 | — |
| 23 | succeeded | -1.6809773896 | 9.37628 | 1 | — |