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http://hdl.handle.net/1942/13620
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 | Publisher: | AMER PHYSICAL SOC | 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 | Document URI: | http://hdl.handle.net/1942/13620 | 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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