Polarization entangled cluster state generation in a lithium niobate chip

Attila Szep; Richard Kim; Eunsung Shin; Michael L. Fanto; Joseph Osman; Paul M. Alsing

doi:10.1117/12.2240270

24 October 2016 Polarization entangled cluster state generation in a lithium niobate chip

Attila Szep, Richard Kim, Eunsung Shin, Michael L. Fanto, Joseph Osman, Paul M. Alsing

Proceedings Volume 9996, Quantum Information Science and Technology II; 99960G (2016) https://doi.org/10.1117/12.2240270
Event: SPIE Security + Defence, 2016, Edinburgh, United Kingdom

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.

Citation Download Citation

Attila Szep, Richard Kim, Eunsung Shin, Michael L. Fanto, Joseph Osman, and Paul M. Alsing "Polarization entangled cluster state generation in a lithium niobate chip", Proc. SPIE 9996, Quantum Information Science and Technology II, 99960G (24 October 2016); https://doi.org/10.1117/12.2240270

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