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12.02.2017

Existence, Stability and Dynamics of Solitary Waves, Vortices and Vortex Rings in Bose-Einstein Condensates: From Theory to Experiments (copy 1)

Τετάρτη 22 Φεβρουαρίου 2017, 13:00-14:00

ΣΕΜΙΝΑΡΙΟ ΤΜΗΜΑΤΟΣ ΦΥΣΙΚΗΣ
Τετάρτη 22 Φεβρουαρίου 2017, 13:00-14:00 
Κτήριο Φυσικής, Αίθουσα Συνελεύσεων Τμήματος 
Ομιλητής: Παναγιώτης Κεβρεκίδης  
Καθηγητής στο Τμήμα Μαθηματικών και Στατιστικής στο University of  Massachusetts, Amherst 
Τίτλος Ομιλίας: Existence, Stability and Dynamics of Solitary Waves,
 Vortices and Vortex Rings in Bose-Einstein Condensates: From Theory to Experiments  
Περίληψη Ομιλίας: In this talk, we will present an overview of some of our recent  theoretical, numerical 
and experimental efforts concerning the static,  stability, bifurcation and dynamic properties of coherent 
structures  that can emerge in one- and higher-dimensional settings within  Bose-Einstein condensates. 
We will discuss how this ultracold setting  can be approximated at a mean-field level by a deterministic 
PDE of the  nonlinear Schrodinger type and what the fundamental nonlinear waves of  the latter are, such 
as dark solitons (in 1d) and vortices (in 2d), as  well as vortex lines and rings (in 3d). Then, we will try to 
go to a  further layer of simplified description via nonlinear ODEs encompassing  the dynamics of the waves 
within the traps that confine them, and the  interactions between them. Finally, we will attempt to compare 
the  analytical and numerical implementation of these reduced descriptions to  recent experimental results 
and speculate towards a number of  interesting possibilities for the future.