Thermalization in a two-dimensional Bose-Einstein condensate with random disorder

Yu Chen Lu^1*, Che-Hsiu Hsueh¹, Tzyy-Leng Horng², Wen-Chin Wu¹

¹Physics, National Taiwan Normal University, Taipei, Taiwan
²Applied Mathematics, Feng Chia University, Taichung, Taiwan

* Presenter:Yu Chen Lu, email:b10303226@mail.ntust.edu.tw

We numerically study the thermalization in a two-dimensional trapped Bose-Einstein condensate with random disorder. Through the effect of disorder, the system initially undergoes breathing motion and eventually reaches equilibrium. It is shown that the equilibrium condensate behaves as a noninteracting gas which obeys the Bose-Einstein statistics at a well-defined temperature. The finding indicates that quantum mechanics can be unified with statistical mechanics in the present system.

Keywords: Thermalization, Random disorder, Two-dimensional Bose gas