INVESTIGADORES
ERMANN Leonardo
artículos
Título:
Dynamics and thermalization of a Bose-Einstein condensate in a Sinai-oscillator trap
Autor/es:
LEONARDO ERMANN; EDUARDO VERGINI; DIMA L. SHEPELYANSKY
Revista:
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2016 vol. 94 p. 13618 - 13628
ISSN:
1050-2947
Resumen:
We study numerically the evolution of Bose-Einstein condensate in the Sinai-oscillator trap described by theGross-Pitaevskii equation in two dimensions. In the absence of interactions, this trap mimics the propertiesof Sinai billiards where the classical dynamics is chaotic and the quantum evolution is described by genericproperties of quantum chaos and random matrix theory. We show that, above a certain border, the nonlinearinteractions between atoms lead to the emergence of dynamical thermalization which generates the statisticalBose-Einstein distribution over eigenmodes of the system without interactions. Below the thermalization border,the evolution remains quasi-integrable. Such a Sinai-oscillator trap, formed by the oscillator potential and arepulsive disk located in the vicinity of the center, had been already realized in first experiments with theBose-Einstein condensate formation by Ketterle group in 1995 and we argue that it can form a convenienttest bed for experimental investigations of dynamical of thermalization. Possible links and implications forKolmogorov turbulence in absence of noise are also discussed.