IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Pumping current of a Luttinger liquid with finite length
Autor/es:
S A FRANCHINO VIÑAS; P A G PISANI; M SALVAY
Revista:
EUROPEAN PHYSICAL JOURNAL B - CONDENSED MATTER
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2012 vol. 85 p. 136 - 144
ISSN:
1434-6028
Resumen:
We study transport properties in a Tomonaga-Luttinger liquid in the presence of two timedependent point like weak impurities, taking into account finite-length eff ects. By employing analytical methods and performing a perturbation theory, we compute the backscattering pumping current (I_{bs}) in diff erent regimes which can be established in relation to the oscillatory frequency of the impurities and to the frequency related to the length and the renormalized velocity (by the electron-electron interactions) of the charge density modes. We investigate the role played by the spatial position of the impurity potentials. We also show how the previous infi nite length results for I_{bs} are modi fied by the fi nite size of the system.