Quasiparticle Properties in Effective Field Theory
Nuclear Theory
2009-11-07 v1 Condensed Matter
High Energy Physics - Phenomenology
Abstract
The quasiparticle concept is an important tool for the description of many-body systems. We study the quasiparticle properties for dilute Fermi systems with short-ranged, repulsive interactions using effective field theory. We calculate the proper self-energy contributions at order (K_f/Lambda)^3, where Lambda is the short-distance scale that sets the size of the effective range parameters and K_f the Fermi momentum. The quasiparticle energy, width, and effective mass to order O(K_f/Lambda)^3 are derived from the calculated self-energy.
Cite
@article{arxiv.nucl-th/0208057,
title = {Quasiparticle Properties in Effective Field Theory},
author = {L. Platter and H. -W. Hammer and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:nucl-th/0208057},
year = {2009}
}
Comments
15 pages, revtex4, 4 PS figures