Consistent description of quantum Brownian motors operating at strong friction -: art. no. 031107

被引：60
|
作者：
Machura, L
Kostur, M
Hänggi, P
Talkner, P
Luczka, J
机构：
[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany
[2] Univ Silesia, Inst Phys, P-40007 Katowice, Poland
来源：
PHYSICAL REVIEW E | 2004年 / 70卷 / 03期
关键词：
D O I：
10.1103/PhysRevE.70.031107
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A quantum Smoluchowski equation is put forward that consistently describes thermal quantum states. In particular, it notably does not induce a violation of the second law of thermodynamics. This so modified kinetic equation is applied to study analytically directed quantum transport at strong friction in arbitrarily shaped ratchet potentials that are driven by nonthermal two-state noise. Depending on the mutual interplay of quantum tunneling and quantum reflection these quantum corrections can induce both, a sizable enhancement or a suppression of transport. Moreover, the threshold for current reversals becomes markedly shifted due to such quantum fluctuations.
引用
收藏
页码：5 / 1
页数：5
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