Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85903
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_fez
Final energy-1.8477905805hartree
Shots1024
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_fez
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2026-02-11T18:34:59+01:00
- Wall time (s)
- 178
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
22 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 | -1.8181781007 | 47.9578 | 2 | — |
| 2 | succeeded | -0.6525841942 | 9.06385 | 1 | — |
| 3 | succeeded | -0.8575735571 | 7.96654 | 1 | — |
| 4 | succeeded | -1.6066004795 | 7.18663 | 1 | — |
| 5 | succeeded | -1.6691379636 | 8.60722 | 1 | — |
| 6 | succeeded | -1.8402330005 | 7.40592 | 1 | — |
| 7 | succeeded | -1.7890881582 | 7.64772 | 1 | — |
| 8 | succeeded | -1.8197455767 | 7.72381 | 2 | — |
| 9 | succeeded | -1.8436215506 | 7.83168 | 1 | — |
| 10 | succeeded | -1.8371175979 | 8.4841 | 1 | — |
| 11 | succeeded | -1.8431229070 | 8.02758 | 1 | — |
| 12 | succeeded | -1.8484301422 | 7.26955 | 1 | — |
| 13 | succeeded | -1.8474371993 | 8.03689 | 1 | — |
| 14 | succeeded | -1.8581795548 | 7.22765 | 1 | — |
| 15 | succeeded | -1.8460258464 | 7.65323 | 1 | — |
| 16 | succeeded | -1.8590250632 | 7.80955 | 1 | — |
| 17 | succeeded | -1.8346482735 | 7.48561 | 1 | — |
| 18 | succeeded | -1.8378980777 | 7.77392 | 1 | — |
| 19 | succeeded | -1.8487098062 | 7.66673 | 1 | — |
| 20 | succeeded | -1.8527379180 | 7.66546 | 1 | — |
| 21 | succeeded | -1.8489222694 | 7.35698 | 1 | — |
| 22 | succeeded | -1.8477905805 | 7.49745 | 1 | — |