Field Theories with ((Superconductor** Solutions
نویسنده
چکیده
S u m m a r y . T h e conditions for the existence of non-perturbative type ~ superconductor ~) solutions of field theories are examined. A non-covariant canonical transformation method is used to find such solutions for a theory of a fermion interacting with a pseudoscalar bosom A covariant renormalisable method using Feynman integrals is then given. A (~ superconductor ~) solution is found whenever in the normal perturbative-type solution the boson mass squared is negative and the coupling constants satisfy certain inequalities. The symmetry properties of such solutions are examined with the aid of a simple model of self-interacting boson fields. The solutions have lower symmetry than the Lagrangian, and contain mass zero bosons.
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