%0 Journal Article
%T Internal ratchet<br>内部棘轮
%A Lü Yan
%A Wang Hai-Yan
%A Bao Jing-Dong
%A <br>吕艳
%A 王海燕
%A 包景东
%J 物理学报
%D 2010
%I 
%X An internal ratchet model is established, in which a force-free system is coupled to a subsystem with asymmetric periodic structure, while the latter is in a thermal bath environment. The average velocities of particles driven by a periodic signal in two ways are calculated respectively. In comparison with the result of external ratchet with the same parameters, our results show that the maximum directional current of particles in internal ratchet is larger than that in external ratchet. Under the same temperature, the particles in the internal ratchet are more prone to directional movement.
%K directional transport
%K cascade coupling
%K internal ratchet
%K current increase<br>定向输运
%K 级联耦合
%K 内部棘轮
%K 流增大
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=808813BB7D898B40D1B1AB8E9D849FB3&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=DF92D298D3FF1E6E&sid=6AA94D9486B55C60&eid=27F7B07D2C5FAE8C&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=18