Article (Scientific journals)
Effective fluctuation theorems for electron transport in a double quantum dot coupled to a quantum point contact
Bulnes Cuetara, Gregory; Esposito, Massimiliano; Schaller, Gernot et al.
2013In Physical Review. B, Condensed Matter, 88 (115134)
Peer reviewed
 

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Abstract :
[en] A theoretical study is reported of electron transport at finite temperature in a double quantum dot (DQD) capacitively coupled to a quantum point contact (QPC) for the measurement of the DQD charge state. Starting from a Hamiltonian model, a master equation is obtained for the stochastic process taking place in the DQD while the QPC is at or away from equilibrium, allowing us to study the measurement back-action of the QPC onto the DQD. The QPC is treated nonperturbatively in our analysis. Effective fluctuation theorems are established for the full counting statistics of the DQD current under different limiting conditions. These fluctuation theorems hold with respect to an effective affinity characterizing the nonequilibrium environment of the DQD and differing from the applied voltage if the QPC is out of equilibrium. The effective affinity may even change its sign if the Coulomb drag of the QPC reverses the DQD current. The thermodynamic implications of the effective fluctuation theorems are discussed.
Disciplines :
Physics
Author, co-author :
Bulnes Cuetara, Gregory ;  Université Libre de Bruxelles - ULB > Center for Nonlinear Phenomena and Complex systems
Esposito, Massimiliano  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Schaller, Gernot;  Technische Universität Berlin > Institut für theoretische Physik
Gaspard, Pierre;  Université Libre de Bruxelles - ULB > Center for Nonlinear Phenomena and Complex Systems
Language :
English
Title :
Effective fluctuation theorems for electron transport in a double quantum dot coupled to a quantum point contact
Publication date :
19 September 2013
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
Publisher :
American Institute of Physics, New York, United States - New York
Volume :
88
Issue :
115134
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 19 November 2013

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