Quasirelativistic behavior of cold atoms in light fields

Gediminas Juzeliunas, Julius Ruseckas, Markus Lindberg, Luis Santos, Patrik Ohberg

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

We study the influence of three laser beams on the center-of-mass motion of cold atoms with internal energy levels in a tripod configuration. We show that, as for electrons in graphene, the atomic motion can be equivalent to the dynamics of ultrarelativistic two-component Dirac fermions. We propose and analyze an experimental setup for observing such a quasirelativistic motion of ultracold atoms. We demonstrate that the atoms can experience negative refraction and focusing by Veselago-type lenses. We also show how the chiral nature of the atomic motion manifests itself as an oscillation of the atomic internal state population, which depends strongly on the direction of the center-of-mass motion. For certain directions an atom remains in its initial state, whereas for other directions the populations undergo oscillations between a pair of internal states.

Original languageEnglish
Article number011802
Pages (from-to)-
Number of pages4
JournalPhysical Review A
Volume77
Issue number1
DOIs
Publication statusPublished - Jan 2008

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