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Sunday, July 26, 2020 | History

2 edition of Nonequilibrium electron transport in quantum dot and quantum point contact systems found in the catalog.

Nonequilibrium electron transport in quantum dot and quantum point contact systems

Anasuya Erin Krishnaswamy

Nonequilibrium electron transport in quantum dot and quantum point contact systems

by Anasuya Erin Krishnaswamy

  • 284 Want to read
  • 17 Currently reading

Published .
Written in English

    Subjects:
  • Electron transport.,
  • Quantum electronics.

  • Edition Notes

    Statementby Anasuya Erin Krishnaswamy.
    The Physical Object
    Pagination143 leaves, bound :
    Number of Pages143
    ID Numbers
    Open LibraryOL15537494M

    T1 - Nonequilibrium transport through coupled quantum dots with electron-phonon interaction. AU - Ueda, Akiko. AU - Eto, Mikio. PY - /5/9. Y1 - /5/9. N2 - We theoretically study transport properties of coupled quantum dots in parallel in the presence of electron-phonon (e-ph) by:   A tunable Kondo effect has been realized in small quantum dots. A dot can be switched from a Kondo system to a non-Kondo system as the number of electrons on the dot is changed from odd to even. The Kondo temperature can be tuned by means of a gate voltage as a single-particle energy state nears the Fermi energy. Measurements of the temperature and magnetic field dependence of a Cited by:

    extract the full counting statistics of electron transport. Here we report on the real-time detection of single electron tunneling through a QD using a quantum point contact (QPC) as a charge detector. With this method, we can directly measure the distribution function of current fluctuations in the QD by counting electrons. To our. In the first system, each transport channel contains a single quantum dot in contact with two electron reservoirs. The second system we study is constituted of a double quantum dot coupled to two electrodes and probed by a quantum point contact : Gregory Bulnes Cuetara.

    Contact us Postal Address: Cavendish Laboratory 19 J J Thomson Avenue Cambridge CB3 0HE Tel: +44 Electron Transport in Quantum Dots is a timely review covering topics such as the Kondo effect and spin-dependent transport in tunnel coupled dots, quantum chaos in open quantum dots and antidot arrays, and explorations of the novel technological applications of quantum dots and carbon nanotubes.


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Nonequilibrium electron transport in quantum dot and quantum point contact systems by Anasuya Erin Krishnaswamy Download PDF EPUB FB2

Nonequilibrium Quantum Transport Physics in Nanosystems: Foundation of Computational Nonequilibrium Physics in Nanoscience and Nanotechnology [Felix A Buot] on *FREE* shipping on qualifying offers. This book presents the first comprehensive treatment of discrete phase-space quantum mechanics and the lattice Weyl-Wigner formulation of energy band dynamicsCited by: 7.

Unfortunately, electronic transport that reveals quantum size effects in these systems only occurs for low temperatures (mV level Author: Mark A. Reed, John N. Randall, James H. Luscombe. When I was contacted by Kluwer Academic Publishers in the Fall of I, inviting me to edit a volume of papers on the issue of electron transport in quantum dots, I was excited by what I saw as an ideal opportunity to provide an overview of a field of research that has made significant contributions in recent years, both to our understanding of fundamental physics, and to the development of Author: Jonathan P.

Bird. Keywords: nonequilibrium, electron transport, Kondo dot, nonequilibrium Kondo effect PACS: Kv, Fk, Qm The transport of electrons through a quantum dot in the limit of weak coupling to the leads is governed by Coulomb interaction effects, forcing integral electron charge on the dot (Coulomb blockade) [1].

In the case. Based on the Kubo formula for an electron tunneling junction, we revisit the nonequilibrium transport properties through a quantum dot. Since the Fermi level of the quantum dot is set by the conduction electrons of the leads, we calculate the electron current from the left side by assuming the quantum dot coupled to the right lead as another side of the tunneling junction, and the Cited by: 1.

research presented here is electron transport in the nonequilibrium regime in coupled. quantum dot and QPC systems fabricated on A1GaAs/GaAs material using the split gate technique. Near equilibrium magnetoconductance measurements were performed on a quantum dot and a QPC.

Oscillations were seen in the conductance of the sensor. which corresponded to Aharonov-Bohm oscillations in the quantum dot. Indian Journal of Pure & Applied Physics Vol. 54, Februarypp. Non-equilibrium transport through quantum dots Hamidreza Vanaei1*, Zahra Sedaghat2 & Ebrahim Heidari3 1Department of Science, Bushehr Branch, Islamic Azad University, Bushehr, Iran 2Department of Physiology, Medical School, Bushehr University of Medical Sciences, Bushehr, IranAuthor: Hamidreza Vanaei, Zahra Sedaghat, Ebrahim Heidari.

This device is composed of a quantum dot connected to an electron reservoir by a quantum point contact. The dot is coupled capacitively to a top metallic gate. Quantum Point Contacts The quantization of ballistic electron transport through a constriction demonstrates that conduction is transmission.

Published in abbreviated form in Physics Today, Julypage Henk van Houten & Carlo Beenakker∗ Punctuated equilibrium, the notion that evolution in na. One type of artificially fabricated device is a quantum dot. Typically, quantum dots are small regions defined in a semiconductor material with a size of order nm [1].

Since the first studies in the late eighties, the physics of quantum dots has been a very active and fruitful research topic. These dots have proven to be useful systems to study a wide range of physical phenomena.

E ective uctuation theorems for electron transport in a double quantum dot coupled to a quantum point contact Gregory Bulnes Cuetara1, Massimiliano Esposito2,yGernot Schaller3,zand Pierre Gaspard1x 1 Center for Nonlinear Phenomena and Complex Systems, Universit e Libre de Bruxelles, Code PostalCampus Plaine, B Brussels, Belgium.

We first investigate the single electron transistor (SET) and afterwards the double quantum dot (DQD) with a focus on the thermodynamic interpretation. To mimic the interaction of such systems with a charge detector, we afterwards consider interacting transport channels: two coupled SETs and an SET coupled to a low-transparency quantum point contact (QPC).Author: Gernot Schaller.

A quantum point contact (QPC) is a narrow constriction between two wide electrically conducting regions, of a width comparable to the electronic wavelength (nano- to micrometer). The importance of QPC lies in the fact that they prove quantisation of ballistic conductance in mesoscopic systems.

The conductance of QPC is quantised in units of /, the so called conductance quantum. a, Iftikhar et al. 4 model the one- and two-channel Kondo effect using a device consisting of a micrometre-scale semiconductor known as a quantum dot Author: Karyn Le Hur.

But although these systems provide fertile ground for studying heat transport, entropy production and work in the context of quantum mechanics, the field remains in its infancy by: In the rst system, each transport channel contains a single quantum dot in contact with two electron reservoirs.

The second system we study is constituted of a double quantum dot coupled to two electrodes and probed by a quantum point contact detector sensitive to the electronic occupation of the double quantum dot via Coulomb by: 1.

to understand the experimental electronic transport spectra. Fabrication and transport Our approach to producing quantum dot nanostructures suitable for electronic transport studies is to laterally confine resonant tunneling heterostructures.

This approach embeds a quasi-bound quantum dot between two quantum wire by: 6. We study the statistical properties of currents in two particular systems of capacitively coupled parallel transport channels.

In the first system, each transport channel contains a single quantum dot in contact with two electron reservoirs. The second system we study is constituted of a double quantum dot coupled to two electrodes and probed by a quantum point contact by: 1.

In a magnetic field, applied parallel to the two-dimensional electron gas in which the quantum dot is defined, Zeeman splitting of the orbital states is directly observed by measurements of. a single electron on each quantum dot, the double quantum dot system is characterized by an interplay between the spin-spin coupling of the dots with the leads, the so-called Kondo interaction, and the spin-exchange coupling between the dots.

We find that a finite voltage on one quantum dot drives the other quantum dot out of by: 2. Background: Quantum dots connected to larger systems containing a continuum of states like charge reservoirs allow the theoretical study of many-body effects such as the Coulomb blockade and the Kondo effect.

Results: Here, we analyze the nonequilibrium Kondo effect and transport phenomena in a quantum dot coupled to pure monolayer graphene electrodes under Author: Levente Máthé, Ioan Grosu.quantum phase transition point.

The dependences of these oscillation amplitudes on the total-energy increment ΔE are shown in Figure 2 for different quantum-tunneling amplitudes h. The energy supplied by the impact flows linearly into these oscillations, so that the nonequilibrium .We investigate the influences of the electron–phonon interaction on the transport properties of one quantum-dot system with a side-coupled Majorana zero mode (MZM).

Our calculation results show that at the zero-temperature limit, the MZM-governed zero-bias conductance value can be magnified, dependent on the interplay between electron Author: Xiao-Qi Wang, B.H.

Wu, Shu-Feng Zhang, Qi Wang, Wei-Jiang Gong.