Dynamics in many-body localized quantum systems without disorder

Mauro Schiulaz; Alessandro Silva; Markus Mueller

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Dynamics in many-body localized quantum systems without disorder

机译：无障碍多体局域量子系统中的动力学

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We study the relaxation dynamics of strongly interacting quantum systems that display a kind of many-body localization in spite of their translation-invariant Hamiltonian. We show that dynamics starting from a random initial configuration is nonperturbatively slow in the hopping strength, and potentially genuinely nonergodic in the thermodynamic limit. In finite systems with periodic boundary conditions, density relaxation takes place in two stages, which are separated by a long out-of-equilibrium plateau whose duration diverges exponentially with the system size. We estimate the phase boundary of this quantum glass phase, and discuss the role of local resonant configurations. We suggest experimental realizations and methods to observe the discussed nonergodic dynamics.

机译：我们研究了强相互作用的量子系统的弛豫动力学，该系统尽管具有平移不变的哈密顿量，但仍显示出一种多体定位。我们表明，从随机初始构型开始的动力学跃变强度非扰动性很慢，而在热力学极限中可能真正非遍历性。在具有周期性边界条件的有限系统中，密度松弛发生在两个阶段，被一个长时间的不平衡平稳期所隔开，该平稳期的持续时间与系统规模成指数增长。我们估计该量子玻璃相的相边界，并讨论局部共振构型的作用。我们建议实验实现和方法来观察讨论的非遍历动力学。

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来源
《Physical review》 |2015年第18期|184202.1-184202.9|共9页
作者
Mauro Schiulaz; Alessandro Silva; Markus Mueller;
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作者单位

SISSA-International School for Advanced Studies, Via Bonomea 265, 34136 Trieste, Italy,INFN-Sezione di Trieste, Via Bonomea 265, 34146, Trieste, Italy;

SISSA-International School for Advanced Studies, Via Bonomea 265, 34136 Trieste, Italy,The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy;

The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy,Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland;

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正文语种 eng
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关键词
quantum transport; mobility edges; hopping transport;

机译：量子传输流动性边缘;跳车运输;

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Dynamics in many-body localized quantum systems without disorder

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