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

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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Autor principal:	Caso, Alvaro
Publicado:	2012
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346028_v85_n8_p_Caso 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	paper:paper_14346028_v85_n8_p_Caso
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spelling	paper:paper_14346028_v85_n8_p_Caso2023-06-08T16:14:38Z Defining the effective temperature of a quantum driven system from current-current correlation functions Caso, Alvaro 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346028_v85_n8_p_Caso 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, Alvaro 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.
author	Caso, Alvaro
author_facet	Caso, Alvaro
author_sort	Caso, Alvaro
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
publishDate	2012
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346028_v85_n8_p_Caso http://hdl.handle.net/20.500.12110/paper_14346028_v85_n8_p_Caso
work_keys_str_mv	AT casoalvaro definingtheeffectivetemperatureofaquantumdrivensystemfromcurrentcurrentcorrelationfunctions
_version_	1768543528780038144

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

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