Abstract:
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.
Registro:
Documento: |
Artículo
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Título: | Defining the effective temperature of a quantum driven system from current-current correlation functions |
Autor: | Caso, A.; Arracheaa, L.; Lozano, G.S. |
Filiación: | Departamento de Fisica, FCEyN, Universidad de Buenos Aires, Pabelĺon 1, 1428 Buenos Aires, Argentina
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Palabras clave: | 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 |
Año: | 2012
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Volumen: | 85
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Número: | 8
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DOI: |
http://dx.doi.org/10.1140/epjb/e2012-30303-0 |
Título revista: | European Physical Journal B
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Título revista abreviado: | Eur. Phys. J. B
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ISSN: | 14346028
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346028_v85_n8_p_Caso |
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Citas:
---------- APA ----------
Caso, A., Arracheaa, L. & Lozano, G.S.
(2012)
. Defining the effective temperature of a quantum driven system from current-current correlation functions. European Physical Journal B, 85(8).
http://dx.doi.org/10.1140/epjb/e2012-30303-0---------- CHICAGO ----------
Caso, A., Arracheaa, L., Lozano, G.S.
"Defining the effective temperature of a quantum driven system from current-current correlation functions"
. European Physical Journal B 85, no. 8
(2012).
http://dx.doi.org/10.1140/epjb/e2012-30303-0---------- MLA ----------
Caso, A., Arracheaa, L., Lozano, G.S.
"Defining the effective temperature of a quantum driven system from current-current correlation functions"
. European Physical Journal B, vol. 85, no. 8, 2012.
http://dx.doi.org/10.1140/epjb/e2012-30303-0---------- VANCOUVER ----------
Caso, A., Arracheaa, L., Lozano, G.S. Defining the effective temperature of a quantum driven system from current-current correlation functions. Eur. Phys. J. B. 2012;85(8).
http://dx.doi.org/10.1140/epjb/e2012-30303-0