Friedel oscillations in one dimension through path-integrals

V. FERNÁNDEZ; C NAÓN

Sao Lourenco

Encuentro; XXI Encontro Nacional de Fisica de Particulas e Campos; 2000

Sociedade Brasileira de Fisica

We introduce a path-integral approach that allows to compute charge density oscillations in a Luttinger liquid with impurities. We obtain an explicit expression for the envelope of Friedel oscillations in the presence of arbitrary electron-electron potentials. As examples, in order to illustrate the procedure, we show how to use our formula for contact and Coulomb potentials.