Defining the effective temperature of a quantum driven system from current-current correlation functions

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We calculate current-current correlation functions and find an expression for the zero-frequency noise of multiterminal systems driven by harmonically time-dependent voltages within the Keldysh nonequilibrium Green's functions formalism. We also propose a fluctuation-dissipation relation for cu...

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Autores principales: Caso, A., Arracheaa, L., Lozano, G.S.
Formato: JOUR
Materias:
Current-current correlations
Driven system
Effective temperature
Fluctuation-dissipation relation
Local temperature
Low frequency
Multi terminals
Nonequilibrium green's functions formalisms
Single-particle
Systems-driven
Time-dependent voltage
Zero-frequency noise
Condensed matter physics
Physics
Temperature
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346028_v85_n8_p_Caso
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_14346028_v85_n8_p_Caso
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spelling todo:paper_14346028_v85_n8_p_Caso2023-10-03T16:14:34Z Defining the effective temperature of a quantum driven system from current-current correlation functions Caso, A. Arracheaa, L. Lozano, G.S. Current-current correlations Driven system Effective temperature Fluctuation-dissipation relation Local temperature Low frequency Multi terminals Nonequilibrium green's functions formalisms Single-particle Systems-driven Time-dependent voltage Zero-frequency noise Condensed matter physics Physics Temperature We calculate current-current correlation functions and find an expression for the zero-frequency noise of multiterminal systems driven by harmonically time-dependent voltages within the Keldysh nonequilibrium Green's functions formalism. We also propose a fluctuation-dissipation relation for currentcurrent correlation functions to define an effective temperature.We discuss the behavior of this temperature and compare it with the local temperature determined by a thermometer and with the effective temperature defined from a single-particle fluctuation-dissipation relation. We show that for low frequencies all the definitions of the temperature coincide. © Springer-Verlag 2012. Fil:Caso, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346028_v85_n8_p_Caso
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Current-current correlations
Driven system
Effective temperature
Fluctuation-dissipation relation
Local temperature
Low frequency
Multi terminals
Nonequilibrium green's functions formalisms
Single-particle
Systems-driven
Time-dependent voltage
Zero-frequency noise
Condensed matter physics
Physics
Temperature
spellingShingle Current-current correlations
Driven system
Effective temperature
Fluctuation-dissipation relation
Local temperature
Low frequency
Multi terminals
Nonequilibrium green's functions formalisms
Single-particle
Systems-driven
Time-dependent voltage
Zero-frequency noise
Condensed matter physics
Physics
Temperature
Caso, A.
Arracheaa, L.
Lozano, G.S.
Defining the effective temperature of a quantum driven system from current-current correlation functions
topic_facet Current-current correlations
Driven system
Effective temperature
Fluctuation-dissipation relation
Local temperature
Low frequency
Multi terminals
Nonequilibrium green's functions formalisms
Single-particle
Systems-driven
Time-dependent voltage
Zero-frequency noise
Condensed matter physics
Physics
Temperature
description We calculate current-current correlation functions and find an expression for the zero-frequency noise of multiterminal systems driven by harmonically time-dependent voltages within the Keldysh nonequilibrium Green's functions formalism. We also propose a fluctuation-dissipation relation for currentcurrent correlation functions to define an effective temperature.We discuss the behavior of this temperature and compare it with the local temperature determined by a thermometer and with the effective temperature defined from a single-particle fluctuation-dissipation relation. We show that for low frequencies all the definitions of the temperature coincide. © Springer-Verlag 2012.
format JOUR
author Caso, A.
Arracheaa, L.
Lozano, G.S.
author_facet Caso, A.
Arracheaa, L.
Lozano, G.S.
author_sort Caso, A.
title Defining the effective temperature of a quantum driven system from current-current correlation functions
title_short Defining the effective temperature of a quantum driven system from current-current correlation functions
title_full Defining the effective temperature of a quantum driven system from current-current correlation functions
title_fullStr Defining the effective temperature of a quantum driven system from current-current correlation functions
title_full_unstemmed Defining the effective temperature of a quantum driven system from current-current correlation functions
title_sort defining the effective temperature of a quantum driven system from current-current correlation functions
url http://hdl.handle.net/20.500.12110/paper_14346028_v85_n8_p_Caso
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AT arracheaal definingtheeffectivetemperatureofaquantumdrivensystemfromcurrentcurrentcorrelationfunctions
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