Issue
EPL
Volume 82, Number 2, April 2008
Article Number 20002
Number of page(s) 6
Section General
DOI http://dx.doi.org/10.1209/0295-5075/82/20002
Published online 26 March 2008
EPL, 82 (2008) 20002
DOI: 10.1209/0295-5075/82/20002

Wave propagation and "Landau-type" damping from Bohm potential

D. Mostacci, V. Molinari and F. Pizzio

Laboratorio di Ingegneria Nucleare di Montecuccolino, Alma Mater Studiorum Università di Bologna Via dei Colli 16, I-40136 Bologna, Italy,

domiziano.mostacci@unibo.it

received 5 December 2007; accepted in final form 18 February 2008; published April 2008
published online 26 March 2008

Abstract
From Bohm's interpretation of quantum mechanics, a quantum kinetic equation (QKE) can be derived. It is found that waves propagate in force-free gases of non interacting particles, only due to Bohm potential. In the present article the existence of Landau damping in such propagations is investigated. It is found that the Bohm potential alone gives indeed rise to a damping entirely analogous to the classical Landau damping, both for bosons and for weakly degenerate fermions.

PACS
05.60.Gg - Quantum transport.
51.10.+y - Kinetic and transport theory of gases.

© EPLA 2008