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首页> 外文期刊>Physical Review, A >Entanglement and entropy production in coupled single-mode Bose-Einstein condensates
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Entanglement and entropy production in coupled single-mode Bose-Einstein condensates

机译：耦合单模Bose-Einstein凝聚液中的缠结和熵产生

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We investigate the time evolution of the entanglement entropy of coupled single-mode Bose-Einstein condensates in a double-well potential at T = 0 temperature by combining numerical results with analytical approximations. We find that the coherent oscillations of the condensates result in entropy oscillations on the top of a linear entropy generation at short time scales. Due to dephasing, the entropy eventually saturates to a stationary value, in spite of the lack of equilibration. We show that this long-time limit of the entropy reflects the semiclassical dynamics of the system, revealing the self-trapping phase transition of the condensates at large interaction strength by a sudden entropy jump.We compare the stationary limit of the entropy to the prediction of a classical microcanonical ensemble and find surprisingly good agreement in spite of the nonequilibrium state of the system. Our predictions should be experimentally observable on a Bose-Einstein condensate in a double-well potential or on a two-component condensate with interstate coupling.
机译：通过将数值结果与分析近似相结合，研究耦合单模Bose-Einstein冷凝物在T = 0温度下的双孔电位中的缠结熵的时间演变。我们发现冷凝物的相干振荡导致在短时间刻度的线性熵生物的顶部导致熵振荡。由于缺乏平衡，因此熵最终饱和至静止值。我们表明，熵的这种长时间限制反映了系统的半思法动态，突然熵跳跃，揭示了凝结物以大的相互作用强度的自捕集相转变。我们将熵的静止极限与预测进行比较尽管系统不足状态，但既古典的微生物合奏又发现令人惊讶的良好一致。我们的预测应在双孔电位或具有州州偶联的双孔电位或双组分缩合物上进行实验可观察到实验可观察到的。

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