Multipair contributions to the spin response of nuclear matter
Abstract
We analyse the effect of non-central forces on the magnetic susceptibility of degenerate Fermi systems. These include the presence of contributions from transitions to states containing more than one quasiparticle-quasihole pair, which cannot be calculated within the framework of Landau Fermi-liquid theory, and renormalization of the quasiparticle magnetic moment, as well as explicit non-central contributions to the quasiparticle interaction. Consequently, the relationship between the Landau parameters and the magnetic susceptibility for Fermi systems with non-central forces is considerably more complicated than for systems with central forces. We use sum-rule arguments to place a lower bound on the contribution to the static susceptibility coming from transitions to multipair states.
Cite
@article{arxiv.astro-ph/0208453,
title = {Multipair contributions to the spin response of nuclear matter},
author = {E. Olsson and C. J. Pethick},
journal= {arXiv preprint arXiv:astro-ph/0208453},
year = {2009}
}