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Superradiance induced topological vortex phase in a Bose-Einstein condensate

By M. Emre Tasgin, Ozgur E. Mustecaplioglu and Li You

Abstract

We investigate theoretically a topological vortex phase transition induced by a superradiant phase transition in an atomic Bose-Einstein condensate driven by a Laguerre-Gaussian optical mode. We show that superradiant radiation can either carry zero angular momentum, or be in a rotating Laguerre-Gaussian mode with angular momentum. The conditions leading to these two regimes 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.Comment: 4 pages, 3 figures, submitted to Phys. Rev. Let

Topics: Condensed Matter - Quantum Gases
Year: 2011
DOI identifier: 10.1103/PhysRevA.84.063628
OAI identifier: oai:arXiv.org:1103.2478
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