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Entanglement criteria and nonlocality for multimode continuous-variable systems. (English) Zbl 1255.81076

Summary: We demonstrate how to efficiently derive a broad class of inequalities for entanglement detection in multimode 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 the Cavalcanti-Foster-Reid-Drummond multipartite Bell inequality [E. G. Cavalcanti et al., Phys. Rev. Lett. 99, No. 21, Article ID 210405 (2007; Zbl 1255.81055)] that the nonlocality necessarily implies negative PT entangled states

MSC:

81P40 Quantum coherence, entanglement, quantum correlations

Citations:

Zbl 1255.81055
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References:

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