Dynamics of quantum light in integrated nonlinear waveguide arrays and generation of robust continuous variable entanglement

Abstract

We study a class of nonlinear waveguide arrays where the waveguides are endowed with quadratic non- linearity and are coupled through the evanescent overlap of the guided modes. We study both the stimulated and spontaneous process in the array and show the viability of such an array as a platform for generating both bipartite and tripartite continuous variable entanglement on demand. We explicitly address the affect of realistic losses on the entanglement produced, briefly discuss the possible types of nonlinear materials that could be used, and suggest solutions to the possible phase matching issues in the waveguides. The simultaneous generation and manipulation of the light on a single waveguide chip circumvents the usual bandwidth problems associated with the use of external bulky optical elements and makes this avenue promising for further investigation.

5 pages, 5 figures

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• Squeezed state evolution and entanglement in lossy coupled resonator optical waveguides
• Production of genuine multimode entanglement in circular waveguides with long-range interactions
• Counterpropagating continuous variable entangled states in lossy coupled-cavity optical waveguides
• Coupled parametric processes in binary nonlinear photonic structures
• A general approach to model counterpropagating continuous variable entangled states in a lossy CROW