Three-body interactions in Fermi systems
Nuclear Theory
2011-01-26 v1 Quantum Gases
High Energy Physics - Phenomenology
Nuclear Experiment
Abstract
We show that the contributions of three-quasiparticle interactions to normal Fermi systems at low energies and temperatures are suppressed by n_q/n compared to two-body interactions, where n_q is the density of excited or added quasiparticles and n is the ground-state density. For finite Fermi systems, three-quasiparticle contributions are suppressed by the corresponding ratio of particle numbers N_q/N. This is illustrated for polarons in strongly interacting spin-polarized Fermi gases and for valence neutrons in neutron-rich calcium isotopes.
Cite
@article{arxiv.1101.4858,
title = {Three-body interactions in Fermi systems},
author = {B. Friman and A. Schwenk},
journal= {arXiv preprint arXiv:1101.4858},
year = {2011}
}
Comments
16 pages, 1 figure; to appear in Festschrift on the occasion of Gerry Brown's 85th birthday, Ed. Sabine Lee (World Scientific)