%0 Journal Article
%T Quantum tunnelling time of cold atom passing through a laser beam<br>冷原子穿越激光束的量子隧穿时间
%A Tang Lin
%A Huang Jian-Hu
%A Duan Zheng-Lu
%A Zhang Wei-Ping
%A Zhou Zhao-Ying
%A Feng Yan-Ying
%A Zhu Rong
%A <br>唐 霖
%A 黄建华
%A 段正路
%A 张卫平
%A 周兆英
%A 冯焱颖
%A 朱 荣
%J 物理学报
%D 2006
%I 
%X Atoms can be prepared at low temperatures by laser cooling. The center of mass motion of the cold atoms exhibits wave nature of quantum mechanics. In this paper, we study the quantum tunneling effect of a cold atomic beam propagating through a laser beam which is blue detuned. The blue detuned laser beam is physically equal to a quantum potential barrier. According to two-level model of atom, we systematically analyze the quantum reflection and transmission of the vector atomic matter wave with internal structures propagating through a laser beam. Quantum tunneling time the atomic beam spends in transmitting the laser beam is studied in details. Because of quantum wave nature, cold atoms tunneling through a laser beam can obviously have a completely different feature from that of a classical particle (hot atom).
%K cold atom
%K atom optics
%K quantum tunnelling<br>冷原子
%K 原子光学
%K 量子隧穿
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=64753C964A0CF4B9&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=59906B3B2830C2C5&sid=C306B4603BA90F6F&eid=794461C3AE1CAA64&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=36