Topologically nontrivial particles in quantum field theory
Tyupkin Yu. S. , Fateev V. A. , Shvarts A. S.
We establish the existence of unusual ("topologically nontrivial") particles in two-dimensional models in a situation wherein there are no solitons in the corresponding classical problem (in particular, for the λφ4 and g\pi|/<f> interactions at large λ and small g).