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Title: Stochastically driven single-level quantum dot: A nanoscale finite-time thermodynamic machine and its various operational modes
Authors: Esposito, Massimiliano
Kumar, Niraj
Lindenberg, Katja
VAN DEN BROECK, Christian 
Issue Date: 2012
Source: PHYSICAL REVIEW E, 85 (3)
Abstract: 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.
Notes: [Esposito, Massimiliano] Univ Luxembourg, Complex Syst & Stat Mech, L-1511 Luxembourg, Luxembourg. [Kumar, Niraj; Lindenberg, Katja] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA. [Kumar, Niraj; Lindenberg, Katja] Univ Calif San Diego, BioCircuits Inst, La Jolla, CA 92093 USA. [Van den Broeck, Christian] Hasselt Univ, B-3590 Diepenbeek, Belgium.
Keywords: Fluids & Plasmas Physics; Mathematical Physics; maximum power; efficiency
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ISSN: 1539-3755
DOI: 10.1103/PhysRevE.85.031117
ISI #: 000301518900003
Category: A1
Type: Journal Contribution
Validations: ecoom 2013
Appears in Collections:Research publications

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