Efficient entanglement criteria beyond Gaussian limits using Gaussian measurements

Hyunchul Nha, Su Yong Lee, Se Wan Ji, M. S. Kim

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Abstract

We present a formalism to derive entanglement criteria beyond the Gaussian regime that can be readily tested by only homodyne detection. The measured observable is the Einstein-Podolsky-Rosen (EPR) correlation. Its arbitrary functional form enables us to detect non-Gaussian entanglement even when an entanglement test based on second-order moments fails. We illustrate the power of our experimentally friendly criteria for a broad class of non-Gaussian states under realistic conditions. We also show rigorously that quantum teleportation for continuous variables employs a specific functional form of EPR correlation.

Original languageEnglish
Article number030503
JournalPhysical Review Letters
Volume108
Issue number3
DOIs
Publication statusPublished - 19 Jan 2012

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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