Heat dissipation and fluctuations in a driven quantum dot

Hofmann, Andrea and Maisi, Ville F. and Basset, Julien and Reichl, Christian and Wegscheider, Werner and Ihn, Thomas and Ensslin, Klaus and Jarzynski, Christopher. (2017) Heat dissipation and fluctuations in a driven quantum dot. Physica Status Solidi (B) - Basic Solid State Physics (3). p. 1600546.

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Official URL: https://edoc.unibas.ch/85272/

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While thermodynamics is a useful tool to describe the driving of large systems close to equilibrium, fluctuations dominate the distribution of heat and work in small systems and far from equilibrium. We study the heat generated by driving a small system and change the drive parameters to analyze the transition from a drive leaving the system close to equilibrium to driving it far from equilibrium. Our system is a quantum dot in a GaAs/AlGaAs heterostructure hosting a two-dimensional electron gas. The dot is tunnel-coupled to one part of the two-dimensional electron gas acting as a heat and particle reservoir. We use standard rate equations to model the driven dotâEuro"reservoir system and find excellent agreement with the experiment. Additionally, we quantify the fluctuations by experimentally testing the theoretical concept of the arrow of time, predicting our ability to distinguish whether a process goes in the forward or backward drive direction.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Quantum Computing with Semiconductors (Hofmann)
UniBasel Contributors:Hofmann, Andrea
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:28 Jun 2022 17:23
Deposited On:06 Apr 2022 14:50

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