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arXiv · 1409.7801

Phonon-polaritons in Bose-Einstein condensates induced by Casimir-Polder interaction with graphene

H. Terças·S. Ribeiro·J. T. Mendonça
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Abstract

We consider the mechanical coupling between a two-dimensional Bose-Einstein condensate with a graphene sheet via the vacuum fluctuations of the electromagnetic field which are at the origin of the so-called Casimir-Polder potential. By deriving a self-consistent set of equations governing the dynamics of the condensate and the flexural (out-of-plane) modes of the graphene, we can show the formation of a new type of purely acoustic quasi-particle excitation, a phonon-polariton resulting from the coherent superposition of quanta of flexural and Bogoliubov modes.

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H. Terças, S. Ribeiro, J. T. Mendonça. 2014-09-27. Phonon-polaritons in Bose-Einstein condensates induced by Casimir-Polder interaction with graphene. https://doi.org/10.1088/0953-8984%2F27%2F21%2F214011

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