Date & Time |
06 July 2010 (Tue), 15:30 -
|
|---|---|
Place |
8F large seminar room, Sengen site/千現地区８階中セミナー室
|
Speaker |
Professor Yusuke Kato
|
Affiliation |
Department of Basic Science, The University of Tokyo
|
Title |
Recent developments in theory of superfluidity
|
Abstract |
We discuss recent developments in the theory of superfluidity in condensed Bose-Einstein systems, with a particular focus on a stability criterion of a superfluid phase. We showed in [1,2] that dynamical density fluctuations of superfluids are enhanced near the critical velocity in two kinds of instability: in the Landau instability and in the soliton emission instability . On the basis of this finding, we propose a new criterion for stability of superfluid.
References:
[1] Y. Kato and S. Watabe, J. Low Temp. Phys. 158, 92 (2010) "Generalized Criterion for Stability of Superflow Past an Obstacle"
[2] Y. Kato and S. Watabe, arXiv:1006.2999 (2010) "Dynamical density fluctuations of superfluids near the critical velocity"; PRL, to appear.
|
Contact |
Dr. Akihiro Tanaka(田中秋広） 
|
Recent developments in theory of superfluidity
