Delocalization of Weakly Interacting Bosons in a 1D Quasiperiodic Potential

被引：47

作者：

Michal, V. P. ^{[1
]}

Altshuler, B. L. ^{[2
]}

Shlyapnikov, G. V. ^{[1
,3
,4
]}

机构：

[1] Univ Paris 11, CNRS, Lab Phys Theor & Modeles Stat, F-91405 Orsay, France

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

[3] Univ Amsterdam, Van der Waals Zeeman Inst, NL-1098 XH Amsterdam, Netherlands

[4] Russian Quantum Ctr, Skolkovo 143025, Moscow Region, Russia

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 04期

基金：

欧洲研究理事会;

关键词：

ANDERSON LOCALIZATION; LATTICE POTENTIALS; BAND-STRUCTURE; PARTICLE; CONDUCTANCE; TRANSITION; CRYSTALS; SYSTEM; STATES;

D O I：

10.1103/PhysRevLett.113.045304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider weakly interacting bosons in a 1D quasiperiodic potential (Aubry-Azbel-Harper model) in the regime where all single-particle states are localized. We show that the interparticle interaction may lead to the many-body delocalization and we obtain the finite-temperature phase diagram. Counterintuitively, in a wide range of parameters the delocalization requires stronger coupling as the temperature increases. This means that the system of bosons can undergo a transition from a fluid to insulator (glass) state under heating.

引用

页数：5

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