Fermion vacuum effects on soliton stability

Authors
Citation
Sg. Naculich, Fermion vacuum effects on soliton stability, CRM S MA PH, 2000, pp. 159-162
Citations number
11
Categorie Soggetti
Current Book Contents
Year of publication
2000
Pages
159 - 162
Database
ISI
SICI code
Abstract
Just as fermion zero modes can alter the degeneracy and quantum numbers of a soliton, fermion energies can affect the form and stability of a nontopol ogical soliton. We discuss the kink in a two-dimensional linear sigma model and show that when coupled to fermions, the kink is no longer an extremum of the energy functional. The kink in this model possesses many similaritie s to the electroweak string in the Weinberg-Salam model.