INVESTIGADORES
NAON Carlos Maria
congresos y reuniones científicas
Título:
Transient effects in Luttinger liquids (charla)
Autor/es:
C. M. NAÓN
Lugar:
Buenos Aires
Reunión:
Conferencia; XII Giambiagi School, Low dimensional condensed matter; 2010
Institución organizadora:
Departamento de Física, FCEN, UBA
Resumen:
We study the backscattered current in a Luttinger
liquid in the presence of a point like weak impurity switched on at
finite time, taking into account finite-temperature effects. We
show how the well-known results for a static impurity are distorted.
We derive a dimensionless parameter $\tau_{R}$ as function of the
electron-electron interaction and the temperature, such that for
$\tau_{R} < 1$ ($> 1$) the switching process is relevant
(irrelevant). Our results suggest the possibility of determining
the value of the Luttinger parameter $K$ through time measurements
in transport experiments at fixed voltage.