Nonlocality and entanglement in the XY model

Details Nonlocality and entanglement in the XY model Nonlocality and entanglement in the XY model

2010-07-06

arxiv.org/abs/1007.0983v1

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

Nonlocality and quantum entanglement constitute two special features of quantum systems of paramount importance in quantum information theory (QIT). Essentially regarded as identical or equivalent for many years, they constitute di?erent concepts. Describing nonlocality by means of the maximal violation of two Bell inequalities, we study both entanglement and nonlocality for two and three spins in the XY model. Our results shed a new light into the description of nonlocality and the possible information-theoretic task limitations of entanglement in an in?nite quantum system.

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