N-Way Frequency Beamsplitter for Quantum Photonics

• DOI: 10.48550/arxiv.2405.02453
• Publication Date: 2024-05-03
• Authors: Richard Oliver; Miri Blau; Chaitali Joshi; Xingchen Ji; R. Gutiérrez-Jáur...; Ana Asenjo-Garcı́a; Michal Lipson; Alexander L. Gaeta
• Keywords: Beam splitter

Optical networks are the leading platform for transfer of information due to their low loss and ability scale many channels using optical frequency modes. To fully leverage quantum properties light in this platform, it is desired manipulate higher-dimensional superpositions by orchestrating linear, beamsplitter-type interactions between several simultaneously. We propose a method achieving simultaneous, all-to-all coupling N modes via N-way Bragg-scattering four-wave mixing. By exploiting degree freedom, additional can be multiplexed an interaction medium fixed volume loss, avoiding introduction excess noise. generalize theory frequency-encoded two-mode under mixing approach experimentally verify nature scheme demonstrating three-way multiphoton interference. The two input photons shared among three display interference differing from that classical (coherent-state) inputs. These results show potential our scalability photonic processing general N-mode systems domain.