Non perturbative approach to backscattering off a dynamical impurity in 1D Fermi systems

DANIEL BARCI, L. MORICONI, M. MORICONI, CARLOS NAÓN, MARIANO SALVAY

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

APS

Lugar: Nueva York; Año: 2005 vol. 72 p. 235112 - 235117

0163-1829

We investigate the problem of backscattering off a time-dependent impurity in a one-dimensional electron gas. By combining the Schwinger-Keldysh method with an adiabatic approximation in order to deal with the corresponding out of equilibrium Dirac equation, we compute the total energy density (TED) of the system. We show how the free fermion TED is distorted by the backscattering amplitude and the geometry of the impurity.