Abstract
It is well known that while forward scattering has no effect on the conductance of one-dimensional systems, backscattering off a static impurity suppresses the current. We study the effect of a time-dependent point impurity on the conductance of a one-channel quantum wire. At strong repulsive interaction (Luttinger liquid parameter backscattering renders the linear conductance greater than its value in the absence of the impurity. A possible experimental realization of our model is a constricted quantum wire or a constricted Hall bar at fractional filling factors with a time-dependent voltage at the constriction.
- Received 21 October 2002
DOI:https://doi.org/10.1103/PhysRevB.67.115337
©2003 American Physical Society