Effect of nonadiabatic switching of dynamic perturbations in one-dimensional Fermi systems

Carlos M. Naón, Mariano J. Salvay, and Marta L. Trobo
Phys. Rev. B 70, 195109 – Published 15 November 2004

Abstract

We study a two-dimensional (2D) fermionic quantum-field-theoretical model used to model 1D strongly correlated electrons in the presence of a time-dependent impurity that drives the system out of equilibrium. In contrast to previous investigations, we consider a dynamic barrier switched on at a finite time. We compute the total energy density of the system and establish two well defined regimes in terms of the relationship between the frequency of the time-dependent perturbation Ω and the electron energy ω. Finally, we derive a relaxation time tR such that for times shorter than tR the finite-time switching process is relevant.

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  • Received 14 June 2004

DOI:https://doi.org/10.1103/PhysRevB.70.195109

©2004 American Physical Society

Authors & Affiliations

Carlos M. Naón*, Mariano J. Salvay, and Marta L. Trobo

  • Instituto de Física La Plata, Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina
  • Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina

  • *Email address: naon@fisica.unlp.edu.ar
  • Email address: salvay@fisica.unlp.edu.ar
  • Email address: trobo@fisica.unlp.edu.ar

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Issue

Vol. 70, Iss. 19 — 15 November 2004

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