Stuttgart 2012 – scientific programme
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A: Fachverband Atomphysik
A 15: SYRA 1: Ultracold Rydberg Atoms and Molecules 1
A 15.5: Talk
Tuesday, March 13, 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.