定域绝缘体中涨落驱动的跃迁：离域之前的间歇金属性和路径混沌
Fluctuation driven transitions in localized insulators: Intermittent metallicity and path chaos precede delocalization
摘要：
我们研究了如何相互作用的本地化自由度的影响缓慢的热波动，改变了有效的本地无序。我们计算的时间平均（退火）电导的绝缘制度，并找到三个不同的绝缘相，分离的两个过渡。第一种发生在非谐振绝缘体和间歇金属之间。平均电导总是由罕见的时间波动主导。然而，在间歇金属中，它们是如此强大，以至于系统在指数小的时间内变成金属。第二个转变发生在这个阶段。在较强的无序，有一个单一的最佳路径提供主导贡献的电导在所有的时间，但更接近离域，过渡到一个阶段与波动的路径发生。这最后一个阶段显示了在玻璃体系中的热波动引起的主要衰变通道的显着变化的构型混沌的量子类比。虽然在绝缘体中的退火电导是严格大于电导与典型的，冻结的障碍，我们表明，阈值离域是不敏感的热波动是否承认。这排除了潜在的双稳态，在固定的障碍，本地化阶段与抑制内部波动和离域，内部波动相。
英文摘要：
We study how interacting localized degrees of freedom are affected by slow thermal fluctuations that change the effective local disorder. We compute the time-averaged (annealed) conductance in the insulating regime and find three distinct insulating phases, separated by two transitions. The first occurs between a non-resonating insulator and an intermittent metal. The average conductance is always dominated by rare temporal fluctuations. However, in the intermittent metal, they are so strong that the system becomes metallic for an exponentially small fraction of the time. A second transition occurs within that phase. At stronger disorder, there is a single optimal path providing the dominant contribution to the conductance at all times, but closer to delocalization, a transition to a phase with fluctuating paths occurs. This last phase displays the quantum analogon of configurational chaos in glassy systems in that thermal fluctuations induce significant changes of the dominant decay channels. While in the insulator the annealed conductance is strictly bigger than the conductance with typical, frozen disorder, we show that the threshold to delocalization is insensitive to whether or not thermal fluctuations are admitted. This rules out a potential bistability, at fixed disorder, of a localized phase with suppressed internal fluctuations and a delocalized, internally fluctuating phase.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
