Work

Optimization of deterministic photonic-graph-state generation via local operations

Year: 2024

Type: article

Abstract: Realizing photonic graph states, crucial in various quantum protocols, is challenging due to the absence of deterministic entangling gates in linear optics. To address this, emitter qubits have been leveraged to establish and transfer the entanglement to photons. We introduce an optimization method for such protocols based on the local Clifford equivalency of states and the graph theoretical correlations of the generation cost parameters. Employing this method, we achieve a 50% reduction in use of the two-qubit gates for generation of the arbitrary large repeater graph states and similar significant reductions in the total gate count for generation of random dense graphs.

Source: Physical Review A

DOI: 10.1103/physreva.110.052605

Authors: Sobhan Ghanbari, Jie Lin, Benjamin MacLellan, Luc Robichaud, Piotr Roztocki, Hoi-Kwong Lo

Institutions: University of Toronto, University of Waterloo

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Mitacs, Natural Sciences and Engineering Research Council of Canada, National Research Council Canada, Air Force Office of Scientific Research

Awards: G1176988059, G4028441472, G5467903808