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MO: Fachverband Molekülphysik

MO 7: SYRA: Ultracold Rydberg Atoms and Molecules 1

MO 7.5: Vortrag

Dienstag, 13. März 2012, 12:00–12:15, V47.01

Dipolar Bose-Einstein condensate of Dark-state Polaritons — •Gor Nikoghosyan¹, Frank E. Zimmer², and Martin B. Plenio¹ — ¹Institut für Theoretische Physik, Albert-Einstein Allee 11, Universität Ulm, 89069 Ulm — ²Max Planck Institute for the Physics of Complex Systems, 01187 Dresden

We put forward and discuss in detail a scheme to achieve BEC of stationary-light dark-state polaritons with dipolar interaction. We extend the works on Bose-Einstein condensation of photons and polaritonic quasiparticles, to the regime of dipolar quantum gases. To this end we introduce a diamond-like coupling scheme in a vapor of Rydberg atoms under the frozen gas approximation. To determine the system*s dynamics we employ normal modes and identify the dark-state polariton corresponding to one of the modes. We show that these polaritonic quasiparticles behave in adiabatic limit like Schrodinger particles with a purely dipolar inter-particle interaction. Moreover, we could show, by analyzing the Bogoliubov spectrum of a homogeneous dipolar BEC, that for a special choice of the dipolar interaction parameter the considered dipolar BEC is, in contrast to usual dipolar BEC, very stable.