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We theoretically investigate transport signatures of quantum interference in highly symmetric double quantum dots in a parallel geometry and demonstrate that extremely weak symmetry-breaking effects can have a dramatic influence on the…

介观与纳米尺度物理 · 物理学 2019-03-06 Zeng-Zhao Li , Martin Leijnse

Statistical properties of the electron transport flowing through nanostructures are strongly influenced by the interactions, geometry of the system and/or by type of the external electrodes. These factors affect not only the average current…

介观与纳米尺度物理 · 物理学 2020-06-03 Grzegorz Michałek , Bogdan R. Bułka , Tadeusz Domański , Karol I. Wysokiński

We investigate the effect of a quantised vibrational mode on electron tunneling through a chain of three quantum dots. The outer dots are coupled to voltage leads, but the position of the central dot is not rigidly fixed. Motion of the…

介观与纳米尺度物理 · 物理学 2009-11-07 A. D. Armour , A. MacKinnon

This paper reviews recent studies of mesoscopic fluctuations in transport through ballistic quantum dots, emphasizing differences between conduction through open dots and tunneling through nearly isolated dots. Both the open dots and the…

Electron transport experiments on two lateral quantum dots coupled in series are reviewed. An introduction to the charge stability diagram is given in terms of the electrochemical potentials of both dots. Resonant tunneling experiments show…

介观与纳米尺度物理 · 物理学 2009-11-07 W. G. van der Wiel , S. De Franceschi , J. M. Elzerman , T. Fujisawa , S. Tarucha , L. P. Kouwenhoven

Correlation effects in the transport properties of a single quantum level coupled to electron reservoirs are discussed theoretically using a non-equilibrium Green functions approach. Our method is based on the introduction of a second-order…

凝聚态物理 · 物理学 2016-08-14 A. Levy Yeyati , A. Martín-Rodero , F. Flores

We investigate the dynamics of two interacting electrons confined to a pair of coupled quantum dots driven by an external AC field. By numerically integrating the two-electron Schroedinger equation in time, we find that for certain values…

介观与纳米尺度物理 · 物理学 2009-11-07 C. E. Creffield , G. Platero

We theoretically show that intriguing features of coherent many-body physics can be observed in electron transport through a quantum dot (QD). We first derive a master equation based framework for electron transport in the Coulomb-blockade…

介观与纳米尺度物理 · 物理学 2012-09-03 Martin J. A. Schuetz , Eric M. Kessler , J. Ignacio Cirac , Geza Giedke

We study drag effect in a system of two electrically isolated quantum point contacts (QPC), coupled by Coulomb interactions. Drag current exhibits maxima as a function of QPC gate voltages when the latter are tuned to the transitions…

介观与纳米尺度物理 · 物理学 2009-11-13 Alex Levchenko , Alex Kamenev

Low energy spectra of isotropic quantum dots are calculated in the regime of low electron densities where Coulomb interaction causes strong correlations. The earlier developed pocket state method is generalized to allow for continuous…

介观与纳米尺度物理 · 物理学 2009-10-31 Wolfgang Häusler

We consider electrical transport through single molecules coupled to metal electrodes via tunneling barriers. Approximating the molecule by the Anderson impurity model as the simplest model which includes Coulomb charging effects, we extend…

介观与纳米尺度物理 · 物理学 2007-05-23 Axel Thielmann , Matthias H. Hettler , Jürgen König , Gerd Schön

We analyze the effect of Coulomb interaction on the noise of electric current through an open quantum dot. We demonstrate that the ensemble average value of the noise power acquires an interaction correction even for a dot coupled to the…

介观与纳米尺度物理 · 物理学 2007-11-15 G. Catelani , M. G. Vavilov

We investigate the effect of quantum interferences and Coulomb interaction on the counting statistics of electrons crossing a double quantum dot in a parallel geometry using a generating function technique based on a quantum master equation…

介观与纳米尺度物理 · 物理学 2008-05-26 Sven Welack , Massimiliano Esposito , Upendra Harbola , Shaul Mukamel

We consider the problem of shot noise in resonant tunneling through double quantum dots in the case of interacting particles. Using a many-body quantum mechanical description we evaluate the energy dependent transmission probability, the…

凝聚态物理 · 物理学 2009-11-07 Brahim Elattari , S. A. Gurvitz

We study non-equilibrium electronic transport through a quantum dot or impurity weakly coupled to ferromagnetic leads. Based on the rate equation formalism we derive noise spectra for the transport current. We show that due to quantum…

介观与纳米尺度物理 · 物理学 2009-11-11 S. A. Gurvitz , D. Mozyrsky , G. P. Berman

In the present work we theoretically study thermoelectric transport and heat transfer in a junction including a $T$-shaped double quantum dot coupled to nonmagnetic electrodes and supplemented with a third dot in a parallel configuration.…

介观与纳米尺度物理 · 物理学 2022-07-27 Natalya A. Zimbovskaya

Nanoelectronics devices, such as quantum dot systems or single-molecule transistors, consist of a quantum nanostructure coupled to a macroscopic external electronic circuit. Thermoelectric transport between source and drain leads is…

强关联电子 · 物理学 2022-09-05 Emma L. Minarelli , Jonas B. Rigo , Andrew K. Mitchell

Quantum transport properties through some multilevel quantum dots sandwiched between two metallic contacts are investigated by the use of Green's function technique. Here we do parametric calculations, based on the tight-binding model, to…

介观与纳米尺度物理 · 物理学 2009-11-06 Santanu K. Maiti

We investigate non-equilibrium transport properties of a quantum dot in the Coulomb blockade regime under the condition of negligible inelastic scattering during the dwelling time of the electrons in the dot. Using the quantum kinetic…

介观与纳米尺度物理 · 物理学 2023-11-17 George McArdle , Rose Davies , Igor V. Lerner , Igor V. Yurkevich

Nonlinear transport through a quantum dot is studied in the limit of weak and strong intra-dot Coulomb interaction. For the latter regime the nonequilibrium self-consistent mean field equations for energies and spectral weights of…

强关联电子 · 物理学 2007-05-23 I. Sandalov , R. G. Nazmitdinov