arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1702.06208cond-mat.dis-nncond-mat.quant-gascond-mat.str-el
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驱动诱导多体局域化

Driving induced many-body localization

Eyal Bairey, Gil Refael, Netanel H. Lindner

摘要:

如果驱动足够强或足够低的频率,多体定域系统受到时间周期驱动一般会导致离域和遍历行为的转变。在这里,我们表明,一个特定的驱动器可以有一个相反的效果,采取静态离域系统进入多体本地化阶段。我们证明了这种效果使用一个一维系统的相互作用的硬核玻色子受到振荡的线性势。该系统是弱无序的,并且在没有驱动的情况下是遍历的。时间周期性的线性势导致抑制的有效静态跳跃幅度,增加的相对强度的无序和相互作用。使用数值模拟,我们发现一个过渡到多体本地化阶段以上的临界驱动频率和驱动幅度的范围内。我们的研究结果突出了潜在的驾驶计划利用工程长寿命Floquet阶段的隧道相干抑制。

英文摘要:

Subjecting a many-body localized system to a time-periodic drive generically leads to delocalization and a transition to ergodic behavior if the drive is sufficiently strong or of sufficiently low frequency. Here we show that a specific drive can have an opposite effect, taking a static delocalized system into the many-body localized phase. We demonstrate this effect using a one-dimensional system of interacting hardcore bosons subject to an oscillating linear potential. The system is weakly disordered, and is ergodic absent the driving. The time-periodic linear potential leads to a suppression of the effective static hopping amplitude, increasing the relative strengths of disorder and interactions. Using numerical simulations, we find a transition into the many-body localized phase above a critical driving frequency and in a range of driving amplitudes. Our findings highlight the potential of driving schemes exploiting the coherent suppression of tunneling for engineering long-lived Floquet phases.

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