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UID:0-645@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20190319T110000
DTEND;TZID=Europe/Paris:20190319T120000
DTSTAMP:20190301T101023Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-sergej-moroz-3/
SUMMARY:Séminaire du LPTMS: Sergej Moroz - LPTMS\, salle 201\, 2ème étag
 e\, Bât 100\, Campus d'Orsay - 19 Mar 19 11:00
DESCRIPTION:Low-energy physics of a superfluid vortex lattice\nDr. Sergej M
 oroz (TU Munich)\nSuperfluidity is one of the most intriguing quantum phen
 omena that emerges at temperatures close to absolute zero. Vortices with q
 uantized circulation are the hallmark of superfluidity and are created und
 er external rotation. If the number of vortices is much smaller than the n
 umber of particles\, vortices arrange themselves in a triangular lattice t
 hat exhibits intriguing collective dynamics. Quantum vortex crystals in su
 perfluids and superconductors have been one of the exciting avenues of res
 earch for many decades. In this talk I will introduce an effective field t
 heory built from low-energy degrees of freedom which captures universal pr
 operties of vortex lattices in bosonic superfluids. I will present our res
 ults for current and stress tensor Hall responses and will provide some ar
 guments that the Hall viscosity of a quantum vortex crystal vanishes at ze
 ro frequency and momentum. In the end of the talk\, I will describe new di
 rections that we are currently exploring using this effective field theory
 .
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
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