Stochastically driven single-level quantum dot: A nanoscale finite-time thermodynamic machine and its various operational modes

被引：55

作者：

Esposito, Massimiliano ^{[1
]}

Kumar, Niraj ^{[2
,3
]}

Lindenberg, Katja ^{[2
,3
]}

Van den Broeck, Christian ^{[4
]}

机构：

[1] Univ Luxembourg, Complex Syst & Stat Mech, L-1511 Luxembourg, Luxembourg

[2] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

[3] Univ Calif San Diego, BioCircuits Inst, La Jolla, CA 92093 USA

[4] Hasselt Univ, B-3590 Diepenbeek, Belgium

来源：

PHYSICAL REVIEW E | 2012年 / 85卷 / 03期

基金：

美国国家科学基金会;

关键词：

MAXIMUM POWER; EFFICIENCY;

D O I：

10.1103/PhysRevE.85.031117

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：

We describe a single-level quantum dot in contact with two leads as a nanoscale finite-time thermodynamic machine. The dot is driven by an external stochastic force that switches its energy between two values. In the isothermal regime, it can operate as a rechargeable battery by generating an electric current against the applied bias in response to the stochastic driving and then redelivering work in the reverse cycle. This behavior is reminiscent of the Parrondo paradox. If there is a thermal gradient the device can function as a work-generating thermal engine or as a refrigerator that extracts heat from the cold reservoir via the work input of the stochastic driving. The efficiency of the machine at maximum power output is investigated for each mode of operation, and universal features are identified.

引用

页数：4