Two-mode entanglement in two-component Bose-Einstein condensates
摘要
We study the generation of two-mode entanglement in a two-component Bose-Einstein condensate trapped in a double-well potential. By applying the Holstein-Primakoff transformation, we show that the problem is exactly solvable as long as the number of excitations due to atom-atom interactions remains low. In particular, the condensate constitutes a symmetric Gaussian system, thereby enabling its entanglement of formation to be measured directly by the fluctuations in the quadratures of the two constituent components [Giedke {\it et al.}, Phys. Rev. Lett. {\bf 91}, 107901 (2003)]. We discover that significant two-mode squeezing occurs in the condensate if the interspecies interaction is sufficiently strong, which leads to strong entanglement between the two components.
引用
@article{arxiv.quant-ph/0405117,
title = {Two-mode entanglement in two-component Bose-Einstein condensates},
author = {H. T. Ng and P. T. Leung},
journal= {arXiv preprint arXiv:quant-ph/0405117},
year = {2009}
}
备注
22 pages, 4 figures