Odd-even binding effect from random two-body interactions
Mesoscale and Nanoscale Physics
2009-08-14 v1 Chaotic Dynamics
Nuclear Theory
Abstract
Systematic odd-even binding energy differences in finite metallic particles are usually attributed to mean-field orbital energy effects or to a coherent pairing interaction. We show analytically and numerically that a purely random two-body Hamiltonian can also give rise to an odd-even staggering. We explore the characteristics of this chaotic mechanism and discuss distinguishing features with respect to the other causes of staggering. In particular, randomness-induced staggering is found to be a smooth function of particle number, and the mechanism is seen to be largely insensitive to the presence of a magnetic field.
Cite
@article{arxiv.cond-mat/0202493,
title = {Odd-even binding effect from random two-body interactions},
author = {Thomas Papenbrock and Lev Kaplan and George F. Bertsch},
journal= {arXiv preprint arXiv:cond-mat/0202493},
year = {2009}
}
Comments
8 pages, 4 eps figures