量子纠缠
可见的
物理
非线性系统
量子力学
佯谬
量子
统计物理学
谐振子
理论物理学
作者
Yong Shen,Syed M. Assad,Nicolai B. Grosse,X. Y. Li,M. D. Reid,Ping Koy Lam
标识
DOI:10.1103/physrevlett.114.100403
摘要
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.
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