1.
Phys Rev E
; 108(6-1): 064208, 2023 Dec.
Artigo
em Inglês
| MEDLINE
| ID: mdl-38243486
RESUMO
We construct a simple field theory in which a sphaleron, i.e., a saddle-point particle-like solution, forms a semi-BPS state with a background defect that is an impurity. This means that there is no static force between the sphaleron and the impurity. Therefore, such a sphaleron-impurity system is very much like usual BPS multisolitons, however, still possessing an unstable direction allowing for its decay. We study dynamics of the sphaleron in such a system.
2.
Phys Rev Lett
; 101(13): 131602, 2008 Sep 26.
Artigo
em Inglês
| MEDLINE
| ID: mdl-18851436
RESUMO
We describe the kink solitary waves of a massive nonlinear sigma model with an S2 sphere as the target manifold. Our solutions form a moduli space of nonrelativistic solitary waves in the long wavelength limit of ferromagnetic linear spin chains.