Nonlinear Entanglement and its Application to Generating Cat States

Y. Shen; S. M. Assad; N. B. Grosse; X. Y. Li; M. D. Reid; P. K. Lam

doi:10.1103/PhysRevLett.114.100403

Nonlinear Entanglement and its Application to Generating Cat States

Y. Shen, S. M. Assad, N. B. Grosse, X. Y. Li, M. D. Reid, P. K. Lam

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

The Einstein-Podolsky-Rosen (EPR) paradox, which was formulated to argue for the incompleteness of quantum mechanics, has since metamorphosed into a resource for quantum information. The EPR entanglement describes the strength of linear correlations between two objects in terms of a pair of conjugate observables in relation to the Heisenberg uncertainty limit. We propose that entanglement can be extended to include nonlinear correlations. We examine two driven harmonic oscillators that are coupled via third-order nonlinearity can exhibit quadraticlike nonlinear entanglement which, after a projective measurement on one of the oscillators, collapses the other into a cat state of tunable size.

Original language	English
Article number	100403
Journal	Physical Review Letters
Volume	114
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.114.100403
Publication status	Published - 10 Mar 2015

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Nonlinear Entanglement and its Application to Generating Cat States

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