Non-Markovian full counting statistics in quantum dot molecules

Full counting statistics of electron transport is a powerful diagnostic tool for probing the nature of quantum transport beyond what is obtainable from the average current or conductance measurement alone. In particular, the non-Markovian dynamics of quantum dot molecule plays an important role in t...

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Main Authors:	Xue, Hai-Bin, Jiao, Hu-Jun, Liang, Jiu-Qing, Liu, Wu-Ming
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4354005/

id	pubmed-4354005
recordtype	oai_dc
spelling	pubmed-43540052015-03-17 Non-Markovian full counting statistics in quantum dot molecules Xue, Hai-Bin Jiao, Hu-Jun Liang, Jiu-Qing Liu, Wu-Ming Article Full counting statistics of electron transport is a powerful diagnostic tool for probing the nature of quantum transport beyond what is obtainable from the average current or conductance measurement alone. In particular, the non-Markovian dynamics of quantum dot molecule plays an important role in the nonequilibrium electron tunneling processes. It is thus necessary to understand the non-Markovian full counting statistics in a quantum dot molecule. Here we study the non-Markovian full counting statistics in two typical quantum dot molecules, namely, serially coupled and side-coupled double quantum dots with high quantum coherence in a certain parameter regime. We demonstrate that the non-Markovian effect manifests itself through the quantum coherence of the quantum dot molecule system, and has a significant impact on the full counting statistics in the high quantum-coherent quantum dot molecule system, which depends on the coupling of the quantum dot molecule system with the source and drain electrodes. The results indicated that the influence of the non-Markovian effect on the full counting statistics of electron transport, which should be considered in a high quantum-coherent quantum dot molecule system, can provide a better understanding of electron transport through quantum dot molecules. Nature Publishing Group 2015-03-10 /pmc/articles/PMC4354005/ /pubmed/25752245 http://dx.doi.org/10.1038/srep08978 Text en Copyright © 2015, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Xue, Hai-Bin Jiao, Hu-Jun Liang, Jiu-Qing Liu, Wu-Ming
spellingShingle	Xue, Hai-Bin Jiao, Hu-Jun Liang, Jiu-Qing Liu, Wu-Ming Non-Markovian full counting statistics in quantum dot molecules
author_facet	Xue, Hai-Bin Jiao, Hu-Jun Liang, Jiu-Qing Liu, Wu-Ming
author_sort	Xue, Hai-Bin
title	Non-Markovian full counting statistics in quantum dot molecules
title_short	Non-Markovian full counting statistics in quantum dot molecules
title_full	Non-Markovian full counting statistics in quantum dot molecules
title_fullStr	Non-Markovian full counting statistics in quantum dot molecules
title_full_unstemmed	Non-Markovian full counting statistics in quantum dot molecules
title_sort	non-markovian full counting statistics in quantum dot molecules
description	Full counting statistics of electron transport is a powerful diagnostic tool for probing the nature of quantum transport beyond what is obtainable from the average current or conductance measurement alone. In particular, the non-Markovian dynamics of quantum dot molecule plays an important role in the nonequilibrium electron tunneling processes. It is thus necessary to understand the non-Markovian full counting statistics in a quantum dot molecule. Here we study the non-Markovian full counting statistics in two typical quantum dot molecules, namely, serially coupled and side-coupled double quantum dots with high quantum coherence in a certain parameter regime. We demonstrate that the non-Markovian effect manifests itself through the quantum coherence of the quantum dot molecule system, and has a significant impact on the full counting statistics in the high quantum-coherent quantum dot molecule system, which depends on the coupling of the quantum dot molecule system with the source and drain electrodes. The results indicated that the influence of the non-Markovian effect on the full counting statistics of electron transport, which should be considered in a high quantum-coherent quantum dot molecule system, can provide a better understanding of electron transport through quantum dot molecules.
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4354005/
_version_	1613196758608773120

Non-Markovian full counting statistics in quantum dot molecules

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