Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84235
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8423489437hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-03-03T00:05:01+01:00
- Wall time (s)
- 223
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 | -1.8104709140 | 10.5622 | 2 | — |
| 2 | succeeded | -0.5982458877 | 10.7681 | 2 | — |
| 3 | succeeded | -0.8868955122 | 9.5848 | 2 | — |
| 4 | succeeded | -1.3231128279 | 8.86363 | 2 | — |
| 5 | succeeded | -1.7864713993 | 8.5898 | 2 | — |
| 6 | succeeded | -1.7870090056 | 8.90764 | 2 | — |
| 7 | succeeded | -1.8324564409 | 11.6385 | 2 | — |
| 8 | succeeded | -1.8095712377 | 9.64264 | 2 | — |
| 9 | succeeded | -1.8138681527 | 9.53562 | 2 | — |
| 10 | succeeded | -1.8123895991 | 10.2681 | 2 | — |
| 11 | succeeded | -1.8295578458 | 8.48024 | 2 | — |
| 12 | succeeded | -1.8370503971 | 10.8631 | 2 | — |
| 13 | succeeded | -1.8227785734 | 9.10661 | 2 | — |
| 14 | succeeded | -1.8239059179 | 10.1959 | 2 | — |
| 15 | succeeded | -1.8215037943 | 8.46905 | 2 | — |
| 16 | succeeded | -1.8036959859 | 11.2749 | 2 | — |
| 17 | succeeded | -1.8272272673 | 9.45789 | 2 | — |
| 18 | succeeded | -1.8145077144 | 9.54681 | 2 | — |
| 19 | succeeded | -1.8256749963 | 9.63469 | 2 | — |
| 20 | succeeded | -1.8089273317 | 9.6735 | 2 | — |
| 21 | succeeded | -1.8271557221 | 9.65006 | 2 | — |
| 22 | succeeded | -1.8423489437 | 8.65442 | 2 | — |
| 23 | succeeded | -1.8109045290 | 10.4756 | 2 | — |