期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.040404
关键词
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资金
- CAPES/DAAD
- FAPERJ
- Brazilian Millennium Institute for Quantum Information
- EU
- Consolider QOIT
- Generalitat de Catalunya
- [FIS2007-60182]
- ICREA Funding Source: Custom
A continuous-variable Bell inequality, valid for an arbitrary number of observers measuring observables with an arbitrary number of outcomes, was recently introduced [Cavalcanti et al., Phys. Rev. Lett. 99, 210405 (2007)]. We prove that any n-mode quantum state violating this inequality with quadrature measurements necessarily has a negative partial transposition. Our results thus establish the first link between nonlocality and bound entanglement for continuous-variable systems.
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