Reference : Double quantum dot coupled to a quantum point contact: A stochastic thermodynamics ap...

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/26843

Title :	Double quantum dot coupled to a quantum point contact: A stochastic thermodynamics approach
Language :	-
Author, co-author :	Cuetara, G. B. [Complex Systems and Statistical Mechanics, Physics and Materials Science Research Unit, University of Luxembourg, Luxembourg, Luxembourg]
	Esposito, Massimiliano [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit]
Publication date :	2015
Journal title :	New Journal of Physics
Publisher :	Institute of Physics Publishing
Volume :	17
Issue/season :	9
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	13672630
Keywords :	[en] Nanocrystals ; Quantum chemistry ; Quantum electronics ; Semiconductor quantum dots ; Stochastic systems ; Thermodynamics ; Capacitively coupled ; Fluctuation theorems ; Non-equilibrium properties ; Output power and efficiencies ; Quantum point contact ; Quantum transport ; Stochastic thermodynamics ; Thermodynamic efficiency ; Point contacts
Abstract :	[en] We study the nonequilibrium properties of an electronic circuit composed of a double quantum dot (DQD) channel capacitively coupled to a quantum point contact (QPC) within the framework of stochastic thermodynamics. We show that the transition rates describing the dynamics satisfy a nontrivial local detailed balance and that the statistics of energy and particle currents across both channels obeys a fluctuation theorem. We analyze two regimes where the device operates as a thermodynamic machine and study its output power and efficiency fluctuations. We show that the electrons tunneling through the QPC without interacting with the DQD have a strong effect on the device efficiency. © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Funders :	FNR/A11/02, FNR, Fonds National de la Recherche Luxembourg
Permalink :	http://hdl.handle.net/10993/26843
DOI :	10.1088/1367-2630/17/9/095005

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