Speaker
Farokh Mivehvar
(University of Innsbruck)
Description
In this presentation, I will talk about spatial spin and density self-ordering of a transversely-pumped two-component Bose-Einstein condensate coupled into a single mode of a linear cavity. The onset of the Dicke superradiance phase transition is marked by a simultaneous appearance of a crystalline density order and a spin-wavev order. The self-ordering in our system is driven by a cavity-induced zero spatial-average Raman field and can be considered as a generic order-by-disorder process similar to the random-field-induced order in the two-dimensional classical ferromagnetic $XY$ spin model. However, the seed of the random field in our case stems from quantum fluctuations and is a dynamical entity affected by self-ordering.
Primary authors
Farokh Mivehvar
(University of Innsbruck)
Prof.
Francesco Piazza
(MPKS Dresden)
Prof.
Helmut Ritsch
(Institute for Theoretical Physics, University of Innsbruck)
