[institut] SCL seminar: Dipolar BECs in anisotropic disorder, Antun Balaz, petak 7. jun u 14:00

[Nenad Vukmirović]

Postovane koleginice i kolege,

Pozivam vas na SCL seminar koji ce u petak 7. juna 2013. godine u 14:00 
u citaonici Instituta za fiziku odrzati Antun Balaz (SCL, Institut za 
fiziku u Beogradu). Naslov seminara i apstrakt su dati u nastavku ove 
poruke.


Dipolar Bose-Einstein condensates in a weak anisotropic disorder

Abstract:

In this talk we will study properties of a homogeneous dipolar 
Bose-Einstein condensate in a weak anisotropic random potential with 
Lorentzian correlation at zero temperature. We will solve perturbatively 
the Gross-Pitaevskii equation to second order in the random potential 
strength and obtain analytic results for the disorder ensemble averages 
of both the condensate and the superfluid depletion, the equation of 
state,  and the sound velocity. For a pure contact interaction and a 
vanishing correlation length, we will reproduce the seminal results of 
Huang and Meng, which were originally derived within a Bogoliubov theory 
around a disorder-averaged background field. For dipolar interaction and 
isotropic Lorentzian-correlated disorder, the obtained results are 
qualitatively similar to the case of an isotropic Gaussian-correlated 
disorder. In the case of an anisotropic disorder, the physical 
observables show characteristic anisotropies which arise from the 
formation of fragmented dipolar condensates in the local minima of the 
disorder potential.

Srdacan pozdrav,

-- 
Др Ненад Вукмировић,
Виши научни сарадник,
Лабораторија за примену рачунара у науци,
Институт за физику Београд,
Србија.
URL: http://www.scl.rs/nenad