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Article Dans Une Revue Physical Review A Année : 2010

Generalized Rashba-Dresselhaus spin-orbit coupling for cold atoms

Gediminas Juzeliūnas
  • Fonction : Auteur
Julius Ruseckas
  • Fonction : Auteur
Jean Dalibard

Résumé

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.

Dates et versions

hal-03740947 , version 1 (30-07-2022)

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Citer

Gediminas Juzeliūnas, Julius Ruseckas, Jean Dalibard. Generalized Rashba-Dresselhaus spin-orbit coupling for cold atoms. Physical Review A, 2010, 81 (5), pp.053403. ⟨10.1103/PhysRevA.81.053403⟩. ⟨hal-03740947⟩
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