Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84498
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.7905688840hartree
Shots1024
Runtime executionsession
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
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-12-28T17:07:43+01:00
- Wall time (s)
- 155
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
19 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 | -1.8221996960 | 1888.73 | 2 | — |
| 2 | succeeded | -0.5808630057 | 8.1147 | 1 | — |
| 3 | succeeded | -0.8413917369 | 7.33177 | 1 | — |
| 4 | succeeded | -1.6284320553 | 7.75338 | 1 | — |
| 5 | succeeded | -1.6534482705 | 6.85237 | 1 | — |
| 6 | succeeded | -1.8264511318 | 7.60001 | 1 | — |
| 7 | succeeded | -1.8388931928 | 7.28042 | 1 | — |
| 8 | succeeded | -1.8449765635 | 6.83911 | 1 | — |
| 9 | succeeded | -1.7601217566 | 7.16489 | 1 | — |
| 10 | succeeded | -1.8315502482 | 6.68315 | 1 | — |
| 11 | succeeded | -1.7778515034 | 7.68027 | 1 | — |
| 12 | succeeded | -1.8268153739 | 7.00722 | 1 | — |
| 13 | succeeded | -1.7995421612 | 6.6752 | 1 | — |
| 14 | succeeded | -1.8313399572 | 6.99778 | 1 | — |
| 15 | succeeded | -1.8207406918 | 7.39866 | 1 | — |
| 16 | succeeded | -1.7864020263 | 7.6885 | 1 | — |
| 17 | succeeded | -1.8265357099 | 7.29938 | 1 | — |
| 18 | succeeded | -1.7784151756 | 7.89816 | 1 | — |
| 19 | succeeded | -1.7905688840 | 7.21452 | 1 | — |