| Phase transition of Bose–Einstein condensate under decoherence |
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| 引用本文： | 郑强,易善峰,胡长刚.Phase transition of Bose–Einstein condensate under decoherence[J].中国物理 B,2014,23(2):26401-026401. |
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| 作者姓名： | 郑强 易善峰 胡长刚 |
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| 作者单位： | a School of Mathematics and Computer Science, Guizhou Normal University, Guiyang 550001, China;b School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No.11065005);the Creative Talent Programme in University of Guizhou Province,China |
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| 摘 要： | The effect of decoherence on the phase transition of a Bose-Einstein condensate in a symmetric double-well potential is determined by the mean atom number difference. It still has two phases, the tunneling phase and the self-trapping phase, even under decoherence. The density matrix and the operator fidelity also show very different behaviors in the two phases. This suggests that operator fidelity can be used to characterize the phase transition of this Bose-Einstein condensate model, even under decoherence.
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| 关 键 词： | Bose– Einstein condensate phase transition operator fidelity |
| 收稿时间： | 2013-04-28 |
Phase transition of Bose–Einstein condensate under decoherence |
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| Zheng Qiang,Yi Shan-Feng,Hu Chang-Gang.Phase transition of Bose–Einstein condensate under decoherence[J].Chinese Physics B,2014,23(2):26401-026401. |
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| Authors: | Zheng Qiang Yi Shan-Feng Hu Chang-Gang |
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| Institution: | a School of Mathematics and Computer Science, Guizhou Normal University, Guiyang 550001, China;b School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China |
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| Abstract: | The effect of decoherence on the phase transition of a Bose–Einstein condensate in a symmetric double-well potential is determined by the mean atom number difference. It still has two phases, the tunneling phase and the self-trapping phase, even under decoherence. The density matrix and the operator fidelity also show very different behaviors in the two phases. This suggests that operator fidelity can be used to characterize the phase transition of this Bose–Einstein condensate model, even under decoherence. |
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| Keywords: | Bose– Einstein condensate phase transition operator fidelity |
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