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

Weibin Li·Wenxing Yang·Xiaotao Xie·Jiahua Li·Xiaoxue Yang
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Abstract

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.

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Weibin Li, Wenxing Yang, Xiaotao Xie, Jiahua Li, Xiaoxue Yang. 2005-12-22. Correlation and entanglement of two-component Bose-Einstein condensates in a double well. https://doi.org/10.1088/0953-4075%2F39%2F14%2F016

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