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

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.

arXiv comment9 pages, 5 figures, v2 closer to published version

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Cited by in corpus (4)

• Quantum state engineering in arrays of nonlinear waveguides
• Versatile photonic entanglement synthesizer in the spatial domain
• Continuous-variable spatio-spectral quantum networks in nonlinear photonic lattices
• Scalable multimode entanglement based on efficient squeezing of propagation eigenmodes