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Title: Shot noise in electron transport through a double quantum dot : a master equation approach
Authors: Ou Yang, SH
Lam, CH 
You, JQ
Keywords: Double quantum dot
Master equation approach
Shot noise in tunneling current
Issue Date: 2010
Publisher: Chinese Physical Society
Source: Chinese physics B, 2010, v. 19, no. 5, p. 505191-5051910 How to cite?
Journal: Chinese physics B 
Abstract: We study shot noise in tunneling current through a double quantum dot connected to two electric leads. We derive two master equations in the occupation-state basis and the eigenstate basis to describe the electron dynamics. The approach based on the occupation-state basis, despite being widely used in many previous studies, is valid only when the interdot coupling strength is much smaller than the energy difference between the two dots. In contrast, the calculations using the eigenstate basis are valid for an arbitrary interdot coupling. Using realistic model parameters, we demonstrate that the predicted currents and shot-noise properties from the two approaches are significantly different when the interdot coupling is not small. Furthermore, properties of the shot noise predicted using the eigenstate basis successfully reproduce qualitative features found in a recent experiment.
ISSN: 1674-1056
DOI: 10.1088/1674-1056/19/5/050519
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