Article

Zero temperature conductance of parallel T-shape double quantum dots

Department of Physics, California State University, Fullerton, Fullerton, California, United States
Physica E Low-dimensional Systems and Nanostructures (Impact Factor: 1.86). 08/2007; 39(2). DOI: 10.1016/j.physe.2007.04.008
Source: arXiv

ABSTRACT We analyze the zero temperature conductance of a parallel T-shaped double quantum dot system. We present an analytical expression for the conductance of the system in terms of the total number of electrons in both quantum dots. Our results confirm that the system's conductance is strongly influenced by the dot which is not directly connected to the leads. We discuss our results in connection with similar results reported in the literature. Comment: 5 pages, revtex

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Available from: Mircea Crisan, Nov 14, 2012
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    ABSTRACT: In a recent paper [Physica E 39 (2007) 214, arXiv:0708.1842v1] Crisan, Grosu, and Tifrea revisited the problem of the conductance through a double-quantum-dot molecule connected to electrodes in a T-shape configuration. The authors obtained an expression for the conductance that disagrees with previous results in the literature. We point out an error in their derivation of the conductance formula and show that it gives unphysical results even for non-interacting quantum dots. (C) 2008 Published by Elsevier B.V.
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