Finite-Temperature Disordered Bosons in Two Dimensions

被引：11

作者：

Bertoli, G. ^{[1
]}

Michal, V. P. ^{[2
,3
]}

Altshuler, B. L. ^{[4
]}

Shlyapnikov, G. V. ^{[1
,5
,6
,7
,8
]}

机构：

[1] Univ Paris Saclay, Univ Paris Sud, CNRS, LPTMS, F-91405 Orsay, France

[2] Delft Univ Technol, QuTech, NL-2600 GA Delft, Netherlands

[3] Delft Univ Technol, Kavli Inst Nanosci, NL-2600 GA Delft, Netherlands

[4] Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA

[5] Univ Paris Saclay, CEA Saclay, CNRS, SPEC,CEA, F-91191 Gif Sur Yvette, France

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

[7] Univ Amsterdam, Van der Waals Zeeman Inst, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[8] Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 03期

基金：

欧洲研究理事会;

关键词：

ANDERSON LOCALIZATION; 2-DIMENSIONAL SYSTEMS; INSULATOR-TRANSITION; BOSE-GAS; STATES;

D O I：

10.1103/PhysRevLett.121.030403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study phase transitions in a two dimensional weakly interacting Bose gas in a random potential at finite temperatures. We identify superfluid, normal fluid, and insulator phases and construct the phase diagram. At T = 0 one has a tricritical point where the three phases coexist. The truncation of the energy distribution at the trap barrier, which is a generic phenomenon in cold atom systems, limits the growth of the localization length and in contrast to the thermodynamic limit the insulator phase is present at any temperature.

引用

页数：6

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