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Proceedings Paper

Polarization entangled cluster state generation in a lithium niobate chip
Author(s): Attila Szep; Richard Kim; Eunsung Shin; Michael L. Fanto; Joseph Osman; Paul M. Alsing
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Paper Abstract

We present a design of a quantum information processing C-phase (Controlled-phase) gate applicable for generating cluster states that has a form of integrated photonic circuits assembled with cascaded directional couplers on a Ti in-diffused Lithium Niobate (Ti-LN) platform where directional couplers as the integrated optical analogue of bulk beam splitters are used as fundamental building blocks. Based on experimentally optimized fabrication parameters of Ti-LN optical waveguides operating at an 810nm wavelength, an integrated Ti-LN quantum C-phase gate is designed and simulated. Our proposed C-phase gate consists of three tunable directional couplers cascaded together with having different weighted switching ratios for providing a tool of routing vertically- and horizontally-polarized photons independently. Its operation mechanism relies on selectively controlling the optical coupling of orthogonally polarized modes via the change in the index of refraction, and its operation is confirmed by the BPM simulation.

Paper Details

Date Published: 24 October 2016
PDF: 4 pages
Proc. SPIE 9996, Quantum Information Science and Technology II, 99960G (24 October 2016);
Show Author Affiliations
Attila Szep, Air Force Research Lab. (United States)
Richard Kim, Air Force Research Lab. (United States)
Eunsung Shin, Air Force Research Lab. (United States)
Michael L. Fanto, Air Force Research Lab. (United States)
Joseph Osman, Air Force Research Lab. (United States)
Paul M. Alsing, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 9996:
Quantum Information Science and Technology II
Mark T. Gruneisen; Miloslav Dusek; John G. Rarity, Editor(s)

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