arXiv:1405.4483 · Physical Review A

Robustness of continuous-variable entanglement via geometrical nonlinearity

Philippe Djorwé, S. G. Nana Engo, P. Woafo

Published Aug 26, 2014• 18 citations

Abstract

We propose a scheme to generate robust stationary continuous-variable entanglement in optomechanical systems, based on geometrical nonlinearity that occurs for large mechanical displacements. Such nonlinearity is often used to correct the dynamics of the systems in the strong-coupling regime. It appears that geometrical nonlinearity enhances the entanglement and shifts its maximum towards high detuning values. Using the experimental parameters, we find that such a scheme generates a very robust entanglement against thermal decoherence even at room temperature. Our results show that geometrical nonlinearity affects entanglement as the optomechanical quantum interface.

DOI: 10.1103/physreva.90.024303

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