Д. Шепелянский "Dynamical thermalization in finite quantum systems" (15.10.2015)
Channel: Лекции по теоретической физике
Date: 2015-12-26

д.ф.-м.н. Д. Шепелянский (CNRS, Toulouse) "Dynamical thermalization in finite interacting sysyems" 

A wave function evolution of a Bose-Einstein condensate, governed by the Gross-Pitaevskii equation in a chaotic billiard, is studied numerically. It is established 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. Links with the Fermi-Pasta-Ulam model and fundamental origins of thermalization in interacting systems are discussed. 

Slides are available at http://www.quantware.ups-tlse.fr/dima/dlstalks/sem2015s3.pdf 

Семинар теоретического отдела ИЯФ им. Г.И.Будкера 15.10.2015