Application of the Generalized Work Relation for an N-level Quantum System

Entropy

Junichi Ishikawa¹  Kazuma Takara¹  Hiroshi-H. Hasegawa¹ 

[1] Department of Mathematical Sciences, Ibaraki University, Bunkyo, Mito, 310-8512 Japan E-Mails:

关键词: nonequilibrium thermodynamics;    maximum work;    generalized work relation;    generalized second law;   

DOI  :  10.3390/e16063471

来源: mdpi

【 摘 要 】

An efficient periodic operation to obtain the maximum work from a nonequilibrium initial state in an N–level quantum system is shown. Each cycle consists of a stabilization process followed by an isentropic restoration process. The instantaneous time limit can be taken in the stabilization process from the nonequilibrium initial state to a stable passive state. In the restoration process that preserves the passive state a minimum period is needed to satisfy the uncertainty relation between energy and time. An efficient quantum feedback control in a symmetric two–level quantum system connected to an energy source is proposed.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland