Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84121
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8412129105hartree
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
- 2026-03-03T13:47:14+01:00
- Wall time (s)
- 282
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 | -1.8010705383 | 24.3736 | 7 | — |
| 2 | succeeded | -0.5669423911 | 8.50227 | 2 | — |
| 3 | succeeded | -0.9091541866 | 9.27647 | 2 | — |
| 4 | succeeded | -1.3130794070 | 9.24496 | 1 | — |
| 5 | succeeded | -1.7709963416 | 8.59664 | 1 | — |
| 6 | succeeded | -1.7316777561 | 21.9638 | 2 | — |
| 7 | succeeded | -1.8183233631 | 9.01271 | 2 | — |
| 8 | succeeded | -1.8002424072 | 8.70707 | 2 | — |
| 9 | succeeded | -1.8277887674 | 17.6297 | 5 | — |
| 10 | succeeded | -1.7780335563 | 9.45088 | 2 | — |
| 11 | succeeded | -1.8171916742 | 8.3298 | 1 | — |
| 12 | succeeded | -1.8169011494 | 9.28219 | 2 | — |
| 13 | succeeded | -1.8412129105 | 8.7279 | 2 | — |
| 14 | succeeded | -1.8136622060 | 9.45708 | 2 | — |
| 15 | succeeded | -1.8031951701 | 23.8114 | 5 | — |
| 16 | succeeded | -1.8041881131 | 10.369 | 2 | — |
| 17 | succeeded | -1.8186008549 | 8.39605 | 1 | — |
| 18 | succeeded | -1.7991020297 | 8.21485 | 1 | — |
| 19 | succeeded | -1.7923162408 | 8.41179 | 2 | — |
| 20 | succeeded | -1.8128080090 | 9.46797 | 2 | — |
| 21 | succeeded | -1.8170529283 | 18.9796 | 5 | — |
| 22 | succeeded | -1.7928842574 | 21.2728 | 2 | — |
| 23 | succeeded | -1.8136578617 | 8.96461 | 2 | — |