Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.83864
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8386422419hartree
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
- 2026-03-03T14:03:13+01:00
- Wall time (s)
- 292
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 | -1.7998548484 | 14.4836 | 3 | — |
| 2 | succeeded | -0.5898373689 | 10.5878 | 3 | — |
| 3 | succeeded | -0.8915756415 | 19.4008 | 7 | — |
| 4 | succeeded | -1.3127617983 | 19.2826 | 3 | — |
| 5 | succeeded | -1.8020158299 | 21.0936 | 3 | — |
| 6 | succeeded | -1.7499327896 | 17.8794 | 7 | — |
| 7 | succeeded | -1.8274251024 | 9.51396 | 3 | — |
| 8 | succeeded | -1.8271681780 | 9.6273 | 3 | — |
| 9 | succeeded | -1.8184567126 | 9.86612 | 3 | — |
| 10 | succeeded | -1.8286429644 | 10.0344 | 3 | — |
| 11 | succeeded | -1.8262901553 | 21.3458 | 7 | — |
| 12 | succeeded | -1.8386422419 | 17.6745 | 3 | — |
| 13 | succeeded | -1.8126064066 | 9.84364 | 3 | — |
| 14 | succeeded | -1.8282884971 | 9.41892 | 3 | — |
| 15 | succeeded | -1.8277784836 | 9.82648 | 3 | — |
| 16 | succeeded | -1.8279015154 | 10.7174 | 3 | — |
| 17 | succeeded | -1.8220902402 | 9.7271 | 3 | — |
| 18 | succeeded | -1.8342970644 | 9.88892 | 3 | — |
| 19 | succeeded | -1.8344379825 | 9.86233 | 3 | — |
| 20 | succeeded | -1.8175488567 | 9.65008 | 3 | — |
| 21 | succeeded | -1.8184680824 | 10.1981 | 3 | — |
| 22 | succeeded | -1.8288386274 | 10.2356 | 3 | — |
| 23 | succeeded | -1.8229200345 | 9.62334 | 4 | — |