Year: 2005
Type: article
Abstract: We examine the statistics of current fluctuations in a junction with a quantum dot described by Kondo Hamiltonian. With the help of modified Keldysh technique we calculate the third current cumulant. As a function of ratio $v=eV∕{T}_{K}$ the third cumulant was obtained for three different regimes: Fermi liquid regime $(v<1)$, crossover interval $(v\ensuremath{\geqslant}1)$, and RG limit $(v⪢1)$. Unlike the case of noninteracting dot, third momentum shows strong nonlinear voltage dependence. Only in the asymptotical limit $v\ensuremath{\rightarrow}\ensuremath{\infty}$ the linear dependence on $V$ is recovered.
Source: Physical Review B
Author: A. Golub
Institution: Ben-Gurion University of the Negev
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2018662064