Speaker
Marcin Mierzeiewski
(Institute of Physics, University of Silesia, 40-007 Katowice, Poland)
Description
Nonlinear real-time response of interacting particles is studied on the example of a one-dimensional tight-binding model of spinless fermions driven by electric field. We show that for a nonintegrable case at finite temperatures the major effect of nonlinearity can be taken into account within the linear response formalism extended by a renormalization of the kinetic energy due to the Joule heating. On the other hand, integrable systems show on constant driving a different universality with a damped oscillating current whereby the frequency is related but not equal to the Bloch oscillations. Results for a single carrier moving in a two-dimensional t-J system under a constant electric field will be discussed as well.
Author
Marcin Mierzeiewski
(Institute of Physics, University of Silesia, 40-007 Katowice, Poland)
Co-authors
J Bonca
(J. Stefan Institut, SI-1000 Ljubljana, Slovenia and Delartment of Physics, FMF, University of Ljubljana, Jadranska 19, SI-1000 Ljuljana, Slovenia)
L Vidmar
(J. Stefan Institut, SI-1000 Ljubljana, Slovenia)
P Prelovsek
(J. Stefan Institut, SI-1000 Ljubljana, Slovenia and Delartment of Physics, FMF, University of Ljubljana, Jadranska 19, SI-1000 Ljuljana, Slovenia)
