title: Quasi-polaritons in Bose-Einstein condensates induced by Casimir-Polder interaction with graphene.
abstract: We consider the mechanical coupling between a two-dimensional Bose-Einstein condensate and 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 quasi-polariton resulting from the coherent superposition of quanta of flexural and Bogoliubov modes.
authors.affiliation: Institut Pascal, PHOTON-N2, Clermont Université, Blaise Pascal University, CNRS, 24 Avenue des Landais, 63177 Aubière Cedex, France. Institute for Theoretical Physics, University of Innsbruck, Innrain 52, 6020 Innsbruck, Austria.
authors.forename: H
authors.initials: H
authors.lastname: Terças
authors.forename: S
authors.initials: S
authors.lastname: Ribeiro
authors.forename: J T
authors.initials: JT
authors.lastname: Mendonça