Current-conserving nonlinear response theory in driven systems

Employing the closed-time path 2PI effective action (CTP 2PI EA) approach, we study the response of an open interacting electronic system to time-dependent external electromagnetic fields. We show that the 2PI EA provides a systematic way of calculating the propagator and response functions of the s...

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Autores principales: Peralta-Ramos, J., Calzetta, E.
Formato: JOUR
Materias:
2PI effective action
Generalized Ward-Takahashi identities
Nonlinear driven transport
Current conservation
Driven system
Electronic systems
Expectation values
External electromagnetic field
Gauge transformation
Mean values
Nonlinear response theory
Response functions
Time-dependent
Electromagnetic fields
Nonlinear control systems
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09214526_v404_n18_p2854_PeraltaRamos
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09214526_v404_n18_p2854_PeraltaRamos
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spelling todo:paper_09214526_v404_n18_p2854_PeraltaRamos2023-10-03T15:45:24Z Current-conserving nonlinear response theory in driven systems Peralta-Ramos, J. Calzetta, E. 2PI effective action Generalized Ward-Takahashi identities Nonlinear driven transport 2PI effective action Current conservation Driven system Electronic systems Expectation values External electromagnetic field Gauge transformation Generalized Ward-Takahashi identities Mean values Nonlinear driven transport Nonlinear response theory Response functions Time-dependent Electromagnetic fields Nonlinear control systems Employing the closed-time path 2PI effective action (CTP 2PI EA) approach, we study the response of an open interacting electronic system to time-dependent external electromagnetic fields. We show that the 2PI EA provides a systematic way of calculating the propagator and response functions of the system. Due to the invariance of the 2PI EA under external gauge transformations, the response functions calculated from it are such that the Ward-Takahashi hierarchy, which ensures current conservation beyond the expectation value level, is satisfied. These findings may be useful in the study of interacting electronic pumping devices, and serve to clarify the connection between current conservation (beyond the mean value level) and real-time nonlinear response theory. © 2009 Elsevier B.V. All rights reserved. Fil:Peralta-Ramos, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calzetta, E. 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_09214526_v404_n18_p2854_PeraltaRamos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 2PI effective action
Generalized Ward-Takahashi identities
Nonlinear driven transport
2PI effective action
Current conservation
Driven system
Electronic systems
Expectation values
External electromagnetic field
Gauge transformation
Generalized Ward-Takahashi identities
Mean values
Nonlinear driven transport
Nonlinear response theory
Response functions
Time-dependent
Electromagnetic fields
Nonlinear control systems
spellingShingle 2PI effective action
Generalized Ward-Takahashi identities
Nonlinear driven transport
2PI effective action
Current conservation
Driven system
Electronic systems
Expectation values
External electromagnetic field
Gauge transformation
Generalized Ward-Takahashi identities
Mean values
Nonlinear driven transport
Nonlinear response theory
Response functions
Time-dependent
Electromagnetic fields
Nonlinear control systems
Peralta-Ramos, J.
Calzetta, E.
Current-conserving nonlinear response theory in driven systems
topic_facet 2PI effective action
Generalized Ward-Takahashi identities
Nonlinear driven transport
2PI effective action
Current conservation
Driven system
Electronic systems
Expectation values
External electromagnetic field
Gauge transformation
Generalized Ward-Takahashi identities
Mean values
Nonlinear driven transport
Nonlinear response theory
Response functions
Time-dependent
Electromagnetic fields
Nonlinear control systems
description Employing the closed-time path 2PI effective action (CTP 2PI EA) approach, we study the response of an open interacting electronic system to time-dependent external electromagnetic fields. We show that the 2PI EA provides a systematic way of calculating the propagator and response functions of the system. Due to the invariance of the 2PI EA under external gauge transformations, the response functions calculated from it are such that the Ward-Takahashi hierarchy, which ensures current conservation beyond the expectation value level, is satisfied. These findings may be useful in the study of interacting electronic pumping devices, and serve to clarify the connection between current conservation (beyond the mean value level) and real-time nonlinear response theory. © 2009 Elsevier B.V. All rights reserved.
format JOUR
author Peralta-Ramos, J.
Calzetta, E.
author_facet Peralta-Ramos, J.
Calzetta, E.
author_sort Peralta-Ramos, J.
title Current-conserving nonlinear response theory in driven systems
title_short Current-conserving nonlinear response theory in driven systems
title_full Current-conserving nonlinear response theory in driven systems
title_fullStr Current-conserving nonlinear response theory in driven systems
title_full_unstemmed Current-conserving nonlinear response theory in driven systems
title_sort current-conserving nonlinear response theory in driven systems
url http://hdl.handle.net/20.500.12110/paper_09214526_v404_n18_p2854_PeraltaRamos
work_keys_str_mv AT peraltaramosj currentconservingnonlinearresponsetheoryindrivensystems
AT calzettae currentconservingnonlinearresponsetheoryindrivensystems
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