【摘 要】
：
We develop a simple and practical scheme to apply sideband cooling to a cloud of rubidium atoms.A sample containing 4 × 1070 87Rb is trapped in a far red detun
【机 构】
：
College of Mechatronic Engineering and Automation, National University of Defense Technology, Changs
论文部分内容阅读
We develop a simple and practical scheme to apply sideband cooling to a cloud of rubidium atoms.A sample containing 4 × 1070 87Rb is trapped in a far red detuned optical lattice.Through optimizing the relevant parameters,i.e.,laser detuning,magnetic field,polarization,and duration time,a temperature around 1.5 μK and phase space density close to 1/500 are achieved.Compared with polarization gradient cooling,the temperature decreases by around one order of magnitude.This technique could be used in high precision measurement such as atomic clocks and atom interferometer.It could also serve as a precooling means before evaporation cooling in a dipole trap,and may be a promising method of achieving quantum degeneracy with purely optical means.
其他文献
We propose a new type of quantum spin Hall (QSH) insulator in chemically functionalized As (110) and Sb (110) film. According to first-principles calculations,
艺术是有民族性的也是有继承性的,民族艺术是整个文化的历史创造的表现。中国画以其鲜明的民族特色和悠久的传统,成为世界文化的重要组成部分,它反映了中国人对宇宙的认识思
Thermal optimization is very important for improving the performances of thermal systems.In engineering,the entropy generation minimization (EGM) has been widel
试验选用沈阳农业大学多年筛选获得的三个基因型纯合的自交系M39、SW2-1、Sg1，配制杂交组合M39×SW2-1、SW2-1×Sg1及其后代，针对目前黄瓜育种中涉及到的果皮颜色、瓜条长度、
本文以红富士苹果为试材,用高效液相色谱(HPLC)法和分光光度计法对多菌灵和辛硫磷两种农药残留进行了测定;用等离子发射光谱仪测定了公路两侧苹果中的铅含量,主要结果如下:1.
In this review article, the recent experimental and theoretical research progress in Bi2Se3-and Bi2Te3-based topolog-ical insulators is presented, with a focus
一张党报,受不受读者的欢迎,接近性如何是一个重要因素。只有把办报的立足点真正转移到面向群众上来,努力接近读者,接近群众,才能更有效地宣传党的方针政策,才会取得更好的