Creation of a vortex in a Bose-Einstein condensate by superradiant scattering

The creation of a topological vortex by a superradiant scattering of a Laguerre-Gaussian (LG) beam off an atomic Bose-Einstein condensate (BEC) is theoretically investigated. It is shown that scattered superradiant radiation can be either in a Gaussian mode without angular momentum or in a LG mode w...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2011-12, Vol.84 (6), Article 063628
Main Authors: Taşgın, M. E., Müstecaplıog̃lu, Ö. E., You, L.
Format: Article
Language:English
Subjects:
ANGULAR MOMENTUM
ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
LASER RADIATION
PHOTON-ATOM COLLISIONS
RECOILS
SCATTERING
SUPERRADIANCE
TOPOLOGY
VORTICES
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Summary:The creation of a topological vortex by a superradiant scattering of a Laguerre-Gaussian (LG) beam off an atomic Bose-Einstein condensate (BEC) is theoretically investigated. It is shown that scattered superradiant radiation can be either in a Gaussian mode without angular momentum or in a LG mode with angular momentum. The conditions leading to these two qualitatively distinct regimes of superradiance are determined in terms of the width for the pump laser and the condensate size for the limiting cases where the recoil energy is both much smaller and larger than the atomic interaction energy.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.84.063628