Entanglement and squeezing in continuous-variable systems
Authors: Gessner M., Pezzè L., Smerzi A.
Autors Affiliation: INO CNR, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy
Abstract: We introduce a multi-mode squeezing coefficient to characterize entanglement in N-partite continuous-variable systems. The coefficient relates to the squeezing of collective observables in the 2N-dimensional phase space and can be readily extracted from the covariance matrix. Simple extensions further permit to reveal entanglement within specific partitions of a multipartite system. Applications with nonlinear observables allow for the detection of non-Gaussian entanglement.
Volume: 1 Pages from: 17-1 to: 17-11
KeyWords: HYBRID ENTANGLEMENT; QUANTUM; CRITERION; DYNAMICS; INFORMATION; GENERATIONDOI: 10.22331/q-2017-07-14-17Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2022-11-27References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here