artículo con referato
"Dynamical thermalization of Bose-Einstein condensate in Bunimovich stadium"
L. Ermann, E. Vergini and D.L. Shepelyansky
Europhys. Lett. 111(5) (2015) 50009/1-6
Abstract
We study numerically the wave function evolution of a Bose-Einstein condensate in a Bunimovich stadium billiard being governed by the Gross-Pitaevskii equation. We show that for a moderate nonlinearity, above a certain threshold, there is emergence of dynamical thermalization which leads to the Bose-Einstein probability distribution over the linear eigenmodes of the stadium. This distribution is drastically different from the energy equipartition over oscillator degrees of freedom which would lead to the ultra-violet catastrophe. We argue that this interesting phenomenon can be studied in cold-atom experiments.
DEPARTAMENTO FISICA TEORICA