Resonant persistent currents for ultracold bosons on a lattice ring

被引：9

作者：

Arwas, Geva ^{[1
]}

Cohen, Doron ^{[1
]}

Hekking, Frank ^{[2
]}

Minguzzi, Anna ^{[2
]}

机构：

[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[2] Univ Grenoble Alpes, CNRS, LPMMC, F-38000 Grenoble, France

来源：

PHYSICAL REVIEW A | 2017年 / 96卷 / 06期

关键词：

Bosons - Mott insulators;

D O I：

10.1103/PhysRevA.96.063616

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We consider a one-dimensional bosonic gas on a ring lattice, in the presence of a localized barrier, and under the effect of an artificial gauge field. By means of exact diagonalization we study the persistent currents at varying interactions and barrier strength, for various values of lattice filling. While generically the persistent currents are strongly suppressed in the Mott insulator phase, they show a resonant behavior when the barrier strength becomes of the order of the interaction energy. We explain this phenomenon using an effective single-particle model. We show that this effect is robust at finite temperature, up the temperature scale where persistent currents vanish.

引用

页数：7

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