Dicke and Fano-Andreev reflections in a triple quantum-dot system

Dicke and Fano-Andreev reflections in a triple quantum-dot system

Abstract This article studies quantum interference effects and their influence on the electronic transport through a parallel triple quantum-dot system coupled to normal and superconducting leads in the linear response and non-equilibrium regime. We model the system by a triple impurity Anderson Ham...

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Autores principales: A. González I., M. Pacheco, A. M. Calle, E. C. Siqueira, P. A. Orellana
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
Materias:
Medicine
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Science
Q
Acceso en línea:https://doaj.org/article/8b9f1bf0767c490795e4e1ff40ee304c
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spelling oai:doaj.org-article:8b9f1bf0767c490795e4e1ff40ee304c2021-12-02T14:21:53ZDicke and Fano-Andreev reflections in a triple quantum-dot system10.1038/s41598-021-83407-62045-2322https://doaj.org/article/8b9f1bf0767c490795e4e1ff40ee304c2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83407-6https://doaj.org/toc/2045-2322Abstract This article studies quantum interference effects and their influence on the electronic transport through a parallel triple quantum-dot system coupled to normal and superconducting leads in the linear response and non-equilibrium regime. We model the system by a triple impurity Anderson Hamiltonian including the Coulomb intra-dot correlations in all quantum-dots. Using the non-equilibrium Green’s function formalism, we calculate the Andreev conductance and the transmittance for energies within the superconductor gap. Our results show that the Andreev reflection spectra, both in the presence and absence of Coulomb interaction, reveal Fano and Dicke-like resonances in analogy to the Fano and Dicke effects in atomic physics. As one of the main results, we obtain that the charge shows abrupt changes due to the Dicke effect.A. González I.M. PachecoA. M. CalleE. C. SiqueiraP. A. OrellanaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
A. González I.
M. Pacheco
A. M. Calle
E. C. Siqueira
P. A. Orellana
Dicke and Fano-Andreev reflections in a triple quantum-dot system
description Abstract This article studies quantum interference effects and their influence on the electronic transport through a parallel triple quantum-dot system coupled to normal and superconducting leads in the linear response and non-equilibrium regime. We model the system by a triple impurity Anderson Hamiltonian including the Coulomb intra-dot correlations in all quantum-dots. Using the non-equilibrium Green’s function formalism, we calculate the Andreev conductance and the transmittance for energies within the superconductor gap. Our results show that the Andreev reflection spectra, both in the presence and absence of Coulomb interaction, reveal Fano and Dicke-like resonances in analogy to the Fano and Dicke effects in atomic physics. As one of the main results, we obtain that the charge shows abrupt changes due to the Dicke effect.
format article
author A. González I.
M. Pacheco
A. M. Calle
E. C. Siqueira
P. A. Orellana
author_facet A. González I.
M. Pacheco
A. M. Calle
E. C. Siqueira
P. A. Orellana
author_sort A. González I.
title Dicke and Fano-Andreev reflections in a triple quantum-dot system
title_short Dicke and Fano-Andreev reflections in a triple quantum-dot system
title_full Dicke and Fano-Andreev reflections in a triple quantum-dot system
title_fullStr Dicke and Fano-Andreev reflections in a triple quantum-dot system
title_full_unstemmed Dicke and Fano-Andreev reflections in a triple quantum-dot system
title_sort dicke and fano-andreev reflections in a triple quantum-dot system
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/8b9f1bf0767c490795e4e1ff40ee304c
work_keys_str_mv AT agonzalezi dickeandfanoandreevreflectionsinatriplequantumdotsystem
AT mpacheco dickeandfanoandreevreflectionsinatriplequantumdotsystem
AT amcalle dickeandfanoandreevreflectionsinatriplequantumdotsystem
AT ecsiqueira dickeandfanoandreevreflectionsinatriplequantumdotsystem
AT paorellana dickeandfanoandreevreflectionsinatriplequantumdotsystem
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