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Finite size effects and equilibration in Bose-Hubbard chains with central well dephasing

机译:具有中央井脱离的Bose-Hubard链中有限尺寸效果和平衡

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We investigate Bose-Hubbard chains in a central depleted well configuration, with dephasing in the middle well. We look at equilibration of populations, pseudo-entropy, and entanglement measures. Using stochastic integration in the truncated Wigner representation, we find that the initial quantum states of the occupied wells have an influence on the subsequent dynamics, and that with more than three wells, the chains do not reach a full equilibrium, with edge effects becoming important, and the time to reach the steady state becoming longer. The evolutions with and without phase diffusion are qualitatively different. We find no convincing evidence of entanglement in the final states with phase diffusion. Although at least one accepted measure indicates the presence of mode entanglement, we are easily able to show that it can give ambiguous predictions.
机译:我们在中央耗尽井配置中调查Bose-Hubbard链,在中间井中脱节。 我们介绍群体的平衡,伪熵和纠缠措施。 在截断的Wigner表示中使用随机整合,我们发现占用井的初始量子态对随后的动态有影响,并且具有三个以上的井,链接不达到全平衡,边缘效应变得重要 ,达到稳定状态的时间变得更长。 具有和不具有相位扩散的演变是定性的。 我们发现没有令人信服的证据表明,最终国家的阶段扩散纠纷。 虽然至少一个接受的措施表明存在模式纠缠,但我们很容易证明它可以给出模糊的预测。

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