Optimized Degenerate Bose–Fermi Mixture in Microgravity: DSMC Simulation of Sympathetic Cooling
LUAN Tian1, JIA Tao1, CHEN Xu-Zong1**, MA Zhao-Yuan2**
1School of Electronics Engineering and Computer Science, Peking University, Beijing 100871 2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Abstract：Applying the direct simulation Monte Carlo (DSMC) method developed for the cold atom system, we explore the possibility of a high-efficiency sympathetic cooling process between 87Rb and 40K without gravitational force in an optical trap. The relation between the pre-cooling of Bosons and the sympathetic cooling efficiency is also studied. We find that the absence of gravitational force is beneficial to the process of sympathetic cooling. Furthermore, an inefficient pre-cooling process will in fact hamper the creation of Fermi degenerate gases. This suggests the advantages of sympathetic cooling in microgravity.
2014, Vol. 31 
