Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85196
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8519617826hartree
Shots512
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
- 512
- Precision
- 0.0441942
- Resilience
- 0
- Submitted
- 2026-03-03T00:01:14+01:00
- Wall time (s)
- 225
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 | -1.8161943869 | 8.12696 | 2 | — |
| 2 | succeeded | -0.5488570909 | 8.50501 | 2 | — |
| 3 | succeeded | -0.8509308585 | 8.7479 | 2 | — |
| 4 | succeeded | -1.3147747681 | 8.43937 | 2 | — |
| 5 | succeeded | -1.7941720695 | 8.73601 | 2 | — |
| 6 | succeeded | -1.7579623702 | 10.9553 | 2 | — |
| 7 | succeeded | -1.8403674021 | 9.29565 | 2 | — |
| 8 | succeeded | -1.8273768740 | 11.2919 | 2 | — |
| 9 | succeeded | -1.8402243119 | 10.8939 | 1 | — |
| 10 | succeeded | -1.8355674992 | 10.0201 | 2 | — |
| 11 | succeeded | -1.8398037298 | 8.70905 | 2 | — |
| 12 | succeeded | -1.8481461339 | 8.58395 | 1 | — |
| 13 | succeeded | -1.8171960185 | 9.17124 | 2 | — |
| 14 | succeeded | -1.8382514589 | 8.99113 | 2 | — |
| 15 | succeeded | -1.8460258464 | 10.0123 | 2 | — |
| 16 | succeeded | -1.8253909881 | 9.15691 | 2 | — |
| 17 | succeeded | -1.8167710922 | 15.4876 | 2 | — |
| 18 | succeeded | -1.8256728242 | 9.97466 | 2 | — |
| 19 | succeeded | -1.8245411353 | 10.0192 | 2 | — |
| 20 | succeeded | -1.8519617826 | 9.53572 | 2 | — |
| 21 | succeeded | -1.8200230685 | 9.14339 | 2 | — |
| 22 | succeeded | -1.8142302226 | 9.0945 | 2 | — |
| 23 | succeeded | -1.8306201617 | 9.72508 | 2 | — |