Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.83853
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8385332951hartree
Shots4096
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
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-03-03T00:13:46+01:00
- Wall time (s)
- 1737
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
25 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 | -1.8075912912 | 9.27034 | 3 | — |
| 2 | succeeded | -0.5992160570 | 9.76479 | 3 | — |
| 3 | succeeded | -0.8659620174 | 340.596 | 25 | — |
| 4 | succeeded | -1.3165763608 | 61.0304 | 4 | — |
| 5 | succeeded | -1.8050905726 | 10.5048 | 3 | — |
| 6 | succeeded | -1.7584761849 | 10.1946 | 3 | — |
| 7 | succeeded | -1.8221037822 | 9.716 | 3 | — |
| 8 | succeeded | -1.8182279923 | 10.1375 | 3 | — |
| 9 | succeeded | -1.8196084259 | 10.0645 | 3 | — |
| 10 | succeeded | -1.8246853116 | 10.1738 | 3 | — |
| 11 | succeeded | -1.8119018163 | 25.3127 | 10 | — |
| 12 | succeeded | -1.8289052851 | 9.52173 | 3 | — |
| 13 | succeeded | -1.8172431609 | 9.86705 | 3 | — |
| 14 | succeeded | -1.8214691078 | 22.6332 | 7 | — |
| 15 | succeeded | -1.8286039336 | 10.5408 | 3 | — |
| 16 | succeeded | -1.8225633950 | 9.36831 | 3 | — |
| 17 | succeeded | -1.8156540313 | 15.7843 | 7 | — |
| 18 | succeeded | -1.8156025447 | 22.3547 | 7 | — |
| 19 | succeeded | -1.8276147919 | 10.3827 | 3 | — |
| 20 | succeeded | -1.8251248660 | 9.83613 | 3 | — |
| 21 | succeeded | -1.8384601208 | 618.507 | 3 | — |
| 22 | succeeded | -1.8357067881 | 190.148 | 3 | — |
| 23 | succeeded | -1.8256879953 | 164.415 | 3 | — |
| 24 | succeeded | -1.8385332951 | 117.988 | 3 | — |
| 25 | succeeded | -1.8264495027 | 17.4768 | 3 | — |