Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions

Abstract We investigate theoretically and experimentally the environment-induced voltage shot noise in current biased Josephson junctions induced by phase particle tunneling. Quantum mechanical treatment based on the Caldeira-Leggett model with tight-binding formulation in local Wannier bases gives...

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Autores principales:	Jyh-Yang Wang, Tao-Hsiang Chung, Teik-Hui Lee, Chii-Dong Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c82fe8d094c04258af4894fb80cda032
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spelling	oai:doaj.org-article:c82fe8d094c04258af4894fb80cda0322021-12-02T16:06:24ZQuadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions10.1038/s41598-017-03790-x2045-2322https://doaj.org/article/c82fe8d094c04258af4894fb80cda0322017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03790-xhttps://doaj.org/toc/2045-2322Abstract We investigate theoretically and experimentally the environment-induced voltage shot noise in current biased Josephson junctions induced by phase particle tunneling. Quantum mechanical treatment based on the Caldeira-Leggett model with tight-binding formulation in local Wannier bases gives a clear picture of the voltage shot noise. A universal form of the zero-frequency noise spectrum is obtained, which exhibits a quadratic dependence on the mean voltage in small bias region. The quadratic dependence is verified experimentally on junctions covering a wide range of parameters, and is found also in junction arrays of various array sizes.Jyh-Yang WangTao-Hsiang ChungTeik-Hui LeeChii-Dong ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jyh-Yang Wang Tao-Hsiang Chung Teik-Hui Lee Chii-Dong Chen Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions
description	Abstract We investigate theoretically and experimentally the environment-induced voltage shot noise in current biased Josephson junctions induced by phase particle tunneling. Quantum mechanical treatment based on the Caldeira-Leggett model with tight-binding formulation in local Wannier bases gives a clear picture of the voltage shot noise. A universal form of the zero-frequency noise spectrum is obtained, which exhibits a quadratic dependence on the mean voltage in small bias region. The quadratic dependence is verified experimentally on junctions covering a wide range of parameters, and is found also in junction arrays of various array sizes.
format	article
author	Jyh-Yang Wang Tao-Hsiang Chung Teik-Hui Lee Chii-Dong Chen
author_facet	Jyh-Yang Wang Tao-Hsiang Chung Teik-Hui Lee Chii-Dong Chen
author_sort	Jyh-Yang Wang
title	Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions
title_short	Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions
title_full	Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions
title_fullStr	Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions
title_full_unstemmed	Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions
title_sort	quadratic characteristics of environment induced voltage shot noise in josephson junctions
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c82fe8d094c04258af4894fb80cda032
work_keys_str_mv	AT jyhyangwang quadraticcharacteristicsofenvironmentinducedvoltageshotnoiseinjosephsonjunctions AT taohsiangchung quadraticcharacteristicsofenvironmentinducedvoltageshotnoiseinjosephsonjunctions AT teikhuilee quadraticcharacteristicsofenvironmentinducedvoltageshotnoiseinjosephsonjunctions AT chiidongchen quadraticcharacteristicsofenvironmentinducedvoltageshotnoiseinjosephsonjunctions
_version_	1718385054525161472

Quadratic Characteristics of Environment Induced Voltage Shot Noise in Josephson Junctions

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