Supercooling of Atoms in an Optical Resonator

Dr. Minghui Xu (徐明辉)JILA, NIST & University of Colorado-Boulder, USA

时间: 7月5日 (周二) 上午10:30 地点: 物理楼中211

报告摘要: The development of laser cooling methods in the 1980's revolutionized atomic physics and has become an essential technology in many fields, including quantum gas physics, precision measurements and quantum information. Laser cooling is based on various schemes that involve the interactions of single atoms with multiple light fields. In this talk, I will present a new theoretical proposal for "supercooling" of atoms in an optical cavity, which is a remarkable example of many-body laser cooling. I will show that the motion of the atoms is subject to a giant frictional force that derives from the growth of atom-atom correlations in steady-state superradiance. This effect leads to a final temperature that can be orders of magnitude lower than the conventional limit for laser cooling of atoms in an optical cavity. The superradiant effects lead to a rapid cooling rate that is greatly enhanced by collective emission into the cavity mode. If successfully observed in experiment, this prediction could have important application in the next generation of atomic clocks and in ultrastable lasers.

报告人简介：于2008年，2011年分别在北京大学取得学士和硕士学位。2016年5月在JILA取得博士学位。研究兴趣为原子分子光物理。已在国际知名期刊发表论著10余篇，含5篇Phys. Rev. Lett

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