The tube solutions in Yang-Mills-Higgs theory are received, in which the Higgs field has the negative energy density. This solutions make up the discrete spectrum numered by two integer and have the finite linear energy density. Ignoring its transverse size, such field configuration is the rest infinity straight string. At the end of 50-th years W.Heisenberg has been investigate the non-linear ...

Monopole solutions in SU(2) Yang–Mills theory, which interact with massive nonlinear spinor fields, described by the Dirac equation, are obtained. These describe a magnetic monopole created spherical lump of fields. It is shown that obtained differ principle from ‘t Hooft–Polyakov so (a) it topologically trivial; (b) radial field decreases as r−3; (c) Higgs not necessary for its existence. demo...

A exotic class of nonlinear p-form nonabelian gauge theories is studied, arising from the most general allowed nontrivial deformation of linear abelian gauge theory for a set of massless 1-form fields and 2-form fields in four dimensions. These theories combine a Chapline-Manton type coupling of the 1-forms and 2-forms, along with Yang-Mills coupling of the 1-forms, a Freedman-Townsend coupling...

Gravitational analogues of the nonlinear electrodynamics of Born and of Born and Infeld are introduced and applied to the black hole problem. This work is mainly devoted to the 2-dimensional case in which the relevant lagrangians are nonpolynomial in the scalar curvature.

A new formalism to describe the spatiotemporal evolution of relativistic Raman backscatter ~RBS! of ultrashort laser pulses in underdense plasma has been developed. This theory is based on an eikonal representation for the RBS field and averaging over the oscillation frequency. Equations are derived for the evolution of the RBS radiation field amplitude and phase and for particle motion in the ...