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\begin{document}
\title{Transport through a quantum dot in presence of correlated hopping}
\author{\underline{S.B. Tooski}}
\affiliation{Institute of Molecular Physics, Polish Academy of Sciences, Pozna{\'n}, Poland}
\affiliation{Faculty of Mathematics and Physics, University of Ljubljana,\\ and Jozef Stefan Institute, Ljubljana, Slovenia}
\author{A. Ram\v sak}
\affiliation{Faculty of Mathematics and Physics, University of Ljubljana,\\ and Jozef Stefan Institute, Ljubljana, Slovenia}
\author{B. R. Bu{\l}ka}
\affiliation{Institute of Molecular Physics, Polish Academy of Sciences, Pozna{\'n}, Poland}
\author{R. \v{Z}itko}
\affiliation{Faculty of Mathematics and Physics, University of Ljubljana,\\ and Jozef Stefan Institute, Ljubljana, Slovenia}
\begin{abstract}
We investigate the electrical conductance and thermopower of a quantum dot coupled to external leads described by an extension of the Anderson impurity model which takes into account the assisted hopping processes, {\it {\it i.e.}}, the occupancy-dependence of the tunneling amplitudes. We provide analytical understanding based on scaling arguments and the Schrieffer-Wolff transformation, corroborated by detailed numerical calculations using the numerical renormalization group (NRG) method. The assisted hopping modifies the coupling to the two-particle state, which shifts the Kondo exchange coupling exponentially reduces or enhances the Kondo temperature and breaks the particle-hole symmetry. 
We discuss the gate-voltage and temperature dependence of the transport properties in various regimes. 
We show that, quite generally, the thermopower is a highly sensitive probe of assisted hopping and Kondo correlations.

\end{abstract}
\maketitle

\end{document}
