Entanglement criteria and nonlocality for multi-mode continuous variable systems

Details Entanglement criteria and nonlocality for multi-mode continuous variable systems Entanglement criteria and nonlocality for multi-mode continuous variable systems

2009-08-17

arxiv.org/abs/0908.2273v2

Phys. Rev. A 80, 020101(R) (2009)

Physics

Quantum Physics

4 pages, published

Scientific paper

We demonstrate how to efficiently derive a broad class of inequalities for entanglement detection in multi-mode continuous variable systems. The separability conditions are established from partial transposition (PT) in combination with several distinct necessary conditions for a quantum physical state, which include previously established inequalities as special cases. Remarkably, our method enables us to support Peres' conjecture to its full generality within the framework of Cavalcanti-Foster-Reid-Drummond multipartite Bell inequality [Phys. Rev. Lett. 99}, 210405 (2007)] that the nonlocality necessarily implies negative PT entangled states.

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