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 and the electron energy . Finally, we derive a relaxation time such that for times shorter than the finite-time switching process is relevant.
- Received 14 June 2004
DOI:https://doi.org/10.1103/PhysRevB.70.195109
©2004 American Physical Society