Generalized Rashba-Dresselhaus spin-orbit coupling for cold atoms

被引：154

作者：

Juzeliunas, Gediminas ^{[1
]}

Ruseckas, Julius ^{[1
]}

Dalibard, Jean ^{[2
]}

机构：

[1] Vilnius Univ, Inst Theoret Phys & Astron, LT-01108 Vilnius, Lithuania

[2] UPMC, Ecole Normale Super, CNRS, Lab Kastler Brossel, F-75005 Paris, France

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 05期

关键词：

GEOMETRIC PHASE; NOBEL LECTURE; ORIGIN;

D O I：

10.1103/PhysRevA.81.053403

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the possibility for generating a new type of spin-orbit coupling for the center-of-mass motion of cold atoms, using laser beams that resonantly couple N atomic internal ground states to an extra state. After a general analysis of the scheme, we concentrate on the tetrapod setup (N = 4) where the atomic state can be described by a three-component spinor, evolving under the action of a Rashba-Dresselhaus-type spin-orbit coupling for a spin 1 particle. We illustrate a consequence of this coupling by studying the negative refraction of atoms at a potential step and show that the amplitude of the refracted beam is significantly increased in comparison to the known case of spin 1/2 Rashba-Dresselhaus coupling. Finally, we explore a possible implementation of this tetrapod setup, using stimulated Raman couplings between Zeeman sublevels of the ground state of alkali-metal atoms.

引用

页数：9

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