Correlation and entanglement of two-component Bose-Einstein condensates in a double well

We consider a novel system of two-component atomic Bose-Einstein condensate in a double-well potential. Based on the well-known two-mode approximation, we demonstrate that there are obvious avoided level-crossings when both interspecies and intraspecies interactions of two species are increased. The...

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Bibliographic Details
Published in:arXiv.org 2005-12
Main Authors: Li, Weibin, Yang, Wenxing, Xie, Xiaotao, Li, Jiahua, Yang, Xiaoxue
Format: Article
Language:English
Subjects:
Bose-Einstein condensates
Cross correlation
Entanglement
Quantum theory
Online Access:Get full text
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Summary:We consider a novel system of two-component atomic Bose-Einstein condensate in a double-well potential. Based on the well-known two-mode approximation, we demonstrate that there are obvious avoided level-crossings when both interspecies and intraspecies interactions of two species are increased. The quantum dynamics of the system exhibits revised oscillating behaviors compared with a single component condensate. We also examine the entanglement of two species. Our numerical calculations show the onset of entanglement can be signed as a violation of Cauchy-Schwarz inequality of second-order cross correlation function. Consequently, we use Von Neumann entropy to quantity the degree of entanglement.
ISSN:2331-8422
DOI:10.48550/arxiv.0512522