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arXiv · 1904.02512

Coupling quasi-phase matching: entanglement buildup in $χ^{(2)}$ nonlinear waveguide arrays

David Barral·Nadia Belabas·Kamel Bencheikh·Juan Ariel Levenson
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Abstract

Wavevector quasi-phase matching was devised in the 1960s as a way to boost nonlinear interactions with efficient quantum noise squeezing as one outstanding outcome. In the era of quantum technologies, we propose a new coupling quasi-phase matching for efficient generation of multimode downconverted quantum light in nonlinear waveguide arrays. We highlight this technique achieving multimode quantum entanglement and Einstein-Podolsky-Rosen steering buildup. We discuss the feasibility of this method with current technology and demonstrate its competitiveness as a resource for continuous variables quantum information.

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David Barral, Nadia Belabas, Kamel Bencheikh, Juan Ariel Levenson. 2020-03-30. Coupling quasi-phase matching: entanglement buildup in $χ^{(2)}$ nonlinear waveguide arrays. https://doi.org/10.1103/physreva.100.013824

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