DC voltage profile of a 1D pumped wire with two dynamical and one static impurities

In this work we study the behavior of the voltage profile of a 1D quantum wire with an impurity when transport is induced by two ac voltages that oscillating with a phase lag define a quantum pump. The voltage profile sensed along the wire by the voltage probe, that we assume weakly coupled to the s...

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Detalles Bibliográficos
Autores principales:	Foieri, Federico, Sánchez, María José
Publicado:	2009
Materias:	Four point resistance Quantum pumps Quantum transport Ac voltage Analytical expressions Analytical results Coupling constants Dc current DC voltage Non-equilibrium Green's function Numerical calculation Perturbation theory Phase lags Quantum wires Voltage probes Voltage profile Differential equations Electric potential Green's function Impurities Perturbation techniques Probes Pumps Quantum electronics Wire Quantum chemistry
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v404_n18_p2802_Foieri http://hdl.handle.net/20.500.12110/paper_09214526_v404_n18_p2802_Foieri
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09214526_v404_n18_p2802_Foieri
record_format	dspace
spelling	paper:paper_09214526_v404_n18_p2802_Foieri2023-06-08T15:50:34Z DC voltage profile of a 1D pumped wire with two dynamical and one static impurities Foieri, Federico Sánchez, María José Four point resistance Quantum pumps Quantum transport Ac voltage Analytical expressions Analytical results Coupling constants Dc current DC voltage Four point resistance Non-equilibrium Green's function Numerical calculation Perturbation theory Phase lags Quantum pumps Quantum transport Quantum wires Voltage probes Voltage profile Differential equations Electric potential Green's function Impurities Perturbation techniques Probes Pumps Quantum electronics Wire Quantum chemistry In this work we study the behavior of the voltage profile of a 1D quantum wire with an impurity when transport is induced by two ac voltages that oscillating with a phase lag define a quantum pump. The voltage profile sensed along the wire by the voltage probe, that we assume weakly coupled to the system, exhibits a Friedel's oscillations structure inside the region delimited by the position of the two ac voltages that induce transport. On the other hand, outside this region the oscillations are suppressed. Using perturbation theory in the coupling constant of the voltage probe we derived analytical expressions for the DC current valid for the adiabatic regime. We also compare our analytical results with the exact numerical calculations using Keldysh non-equilibrium Green's functions formalism. © 2009 Elsevier B.V. All rights reserved. Fil:Foieri, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:José Sánchez, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v404_n18_p2802_Foieri http://hdl.handle.net/20.500.12110/paper_09214526_v404_n18_p2802_Foieri
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Four point resistance Quantum pumps Quantum transport Ac voltage Analytical expressions Analytical results Coupling constants Dc current DC voltage Four point resistance Non-equilibrium Green's function Numerical calculation Perturbation theory Phase lags Quantum pumps Quantum transport Quantum wires Voltage probes Voltage profile Differential equations Electric potential Green's function Impurities Perturbation techniques Probes Pumps Quantum electronics Wire Quantum chemistry
spellingShingle	Four point resistance Quantum pumps Quantum transport Ac voltage Analytical expressions Analytical results Coupling constants Dc current DC voltage Four point resistance Non-equilibrium Green's function Numerical calculation Perturbation theory Phase lags Quantum pumps Quantum transport Quantum wires Voltage probes Voltage profile Differential equations Electric potential Green's function Impurities Perturbation techniques Probes Pumps Quantum electronics Wire Quantum chemistry Foieri, Federico Sánchez, María José DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
topic_facet	Four point resistance Quantum pumps Quantum transport Ac voltage Analytical expressions Analytical results Coupling constants Dc current DC voltage Four point resistance Non-equilibrium Green's function Numerical calculation Perturbation theory Phase lags Quantum pumps Quantum transport Quantum wires Voltage probes Voltage profile Differential equations Electric potential Green's function Impurities Perturbation techniques Probes Pumps Quantum electronics Wire Quantum chemistry
description	In this work we study the behavior of the voltage profile of a 1D quantum wire with an impurity when transport is induced by two ac voltages that oscillating with a phase lag define a quantum pump. The voltage profile sensed along the wire by the voltage probe, that we assume weakly coupled to the system, exhibits a Friedel's oscillations structure inside the region delimited by the position of the two ac voltages that induce transport. On the other hand, outside this region the oscillations are suppressed. Using perturbation theory in the coupling constant of the voltage probe we derived analytical expressions for the DC current valid for the adiabatic regime. We also compare our analytical results with the exact numerical calculations using Keldysh non-equilibrium Green's functions formalism. © 2009 Elsevier B.V. All rights reserved.
author	Foieri, Federico Sánchez, María José
author_facet	Foieri, Federico Sánchez, María José
author_sort	Foieri, Federico
title	DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
title_short	DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
title_full	DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
title_fullStr	DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
title_full_unstemmed	DC voltage profile of a 1D pumped wire with two dynamical and one static impurities
title_sort	dc voltage profile of a 1d pumped wire with two dynamical and one static impurities
publishDate	2009
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v404_n18_p2802_Foieri http://hdl.handle.net/20.500.12110/paper_09214526_v404_n18_p2802_Foieri
work_keys_str_mv	AT foierifederico dcvoltageprofileofa1dpumpedwirewithtwodynamicalandonestaticimpurities AT sanchezmariajose dcvoltageprofileofa1dpumpedwirewithtwodynamicalandonestaticimpurities
_version_	1768543378774949888

DC voltage profile of a 1D pumped wire with two dynamical and one static impurities

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