Transport in quasiperiodic interacting systems: From superdiffusion to subdiffusion

被引：82

作者：

Bar Lev, Yevgeny ^{[1
]}

Kennes, Dante M. ^{[2
]}

Kloeckner, Christian ^{[3
]}

Reichman, David R. ^{[1
]}

Karrasch, Christoph ^{[3
]}

机构：

[1] Columbia Univ, Dept Chem, 3000 Broadway, New York, NY 10027 USA

[2] Columbia Univ, Dept Phys, 3000 Broadway, New York, NY 10027 USA

[3] Free Univ Berlin, Dahlem Ctr Complex Quantum Syst & Fachbereich Phy, D-14195 Berlin, Germany

来源：

EPL | 2017年 / 119卷 / 03期

关键词：

MANY-BODY LOCALIZATION; MATRIX RENORMALIZATION-GROUP; METAL-INSULATOR-TRANSITION; DYNAMICS; STATES;

D O I：

10.1209/0295-5075/119/37003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a combination of numerically exact and renormalization-group techniques we study the nonequilibrium transport of electrons in a one-dimensional interacting system subject to a quasiperiodic potential. For this purpose we calculate the growth of the mean-square displacement as well as the melting of domain walls. While the system is nonintegrable for all studied parameters, there is no finite region of parameters for which we observe diffusive transport. In particular, our model shows a rich dynamical behavior crossing over from superdiffusion to subdiffusion. We discuss the implications of our results for the general problem of many-body localization, with a particular emphasis on the rare region Griffiths picture of subdiffusion. Copyright (C) EPLA, 2017

引用

页数：6

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