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Quantum coherence of double-well BEC: a SU(2)-coherent-state path-integral approach | Yi Zhou
; Hui Zhai
; Rong Lü
; Zhan Xu
; Lee Chang
; | Date: |
19 Apr 2001 | Subject: | cond-mat | Affiliation: | Center for Advanced Study, Tsinghua University, Beijing, P. R. China | Abstract: | Macroscopic quantum coherence of Bose gas in a double-well potential is studied based on SU(2)-coherent-state path-integral. The ground state and fluctuations around it can be obtained by this method. In this picture, one can obtain macroscopic quantum superposition states for attractive Bose gas. The coherent gap of degenerate ground states is obtained with the instanton technique. The phenomenon of macroscopic quantum self-trapping is also discussed. | Source: | arXiv, cond-mat/0104361 | Services: | Forum | Review | PDF | Favorites |
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