Two-leg-ladder Bose-Hubbard models with staggered fluxes

被引：13

作者：

Sachdeva, Rashi ^{[1
]}

Metz, Friederike ^{[1
]}

Singh, Manpreet ^{[2
]}

Mishra, Tapan ^{[2
]}

Busch, Thomas ^{[1
]}

机构：

[1] Grad Univ, Okinawa Inst Sci & Technol, Quantum Syst Unit, Okinawa 9040495, Japan

[2] Indian Inst Technol, Dept Phys, Gauhati 781039, Assam, India

来源：

PHYSICAL REVIEW A | 2018年 / 98卷 / 06期

关键词：

EDGE STATES; SUPERFLUID; TRANSITION; INSULATOR; ELECTRONS; PHYSICS; ATOMS; GAS;

D O I：

10.1103/PhysRevA.98.063612

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the ground-state properties of ultracold atoms trapped in a two-leg ladder potential in the presence of an artificial magnetic field in a staggered configuration. We focus on the strongly interacting regime and use the Landau theory of phase transitions and a mean field Gutzwiller variational method to identify the stable superfluid phases and their boundaries with the Mott-insulator regime as a function of magnetic flux. In addition, we calculate the local and chiral currents of these superfluid phases, which show a staggered vortex-antivortex configuration. The analytical results are confirmed by numerical simulations using a cluster mean-field-theory approach.

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页数：8

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