Finite-time availability in a quantum system

被引：10
|
作者：
Hoffmann, K. H. [1 ]
Salamon, P. [2 ]
机构：
[1] Tech Univ Chemnitz, Dept Phys, D-09107 Chemnitz, Germany
[2] San Diego State Univ, Dept Math Sci, San Diego, CA 92182 USA
来源：
EPL | 2015年 / 109卷 / 04期
关键词：
EXTRACTION; WORK; BATH;
D O I：
10.1209/0295-5075/109/40004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Classically, availability refers to the work available in any reversible process that brings about equilibrium between the system and its environment. Here we introduce an additional meaning of availability as the maximum work associated with the change of an external parameter in the Hamiltonian of a quantum system. This availability can be gained in a FEAT process and for times larger than or equal to the FEAT time, there exists an optimal control that achieves the available work. For shorter times, quantum friction effects are unavoidable and the available work is thereby lowered. This finite-time availability is quantified here as a function of the time available. Copyright (C) EPLA, 2015
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页数：6
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