Entanglement and squeezing in continuous-variable systems

Year: 2017

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.

Journal/Review: QUANTUM

Volume: 1      Pages from: 17-1  to: 17-11

More Information: M.G. acknowledges support from the Alexander von Humboldt foundation. We thank G. Ferrini for useful discussions.
KeyWords: Hybrid Entanglement; Quantum; Criterion; Dynamics; Information; Generation
DOI: 10.22331/q-2017-07-14-17

Citations: 15
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