5 papers
A rigid spherical shell enclosing a degenerate wormhole
Juri Dimaschko
A static configuration consisting of a rigid spherical shell enclosing a degenerate Schwarzschild Klinkhamer wormhole is investigated in general relativity. The shell is analyzed u…
Non-degenerate and degenerate wormholes: a unified approach
Juri Dimaschko
A generalized notion of degenerate wormholes is introduced, defined by the vanishing of the metric determinant g at the throat. It is described by the polynomial, g^2 modified Eins…
Degenerate Geometries as Matter-Free Physical Configurations in General Relativity: Three Examples
Juri Dimaschko
We examine three degenerate spacetime configurations with wormhole topology, obtained via branching coordinate transformations of the Rindler, Minkowski, and Schwarzschild vacuum m…
Matter-free gravitational collapse and the equivalence principle
Juri Dimaschko
The dynamics of a degenerate spherically symmetric wormhole in a vacuum is considered. An extension of the equivalence principle to matter free objects that are the source of a gra…
Topological dressing method for the Einstein-Maxwell equations
Juri Dimaschko
A regular method is proposed that makes it possible to obtain a new exact solution with a wormhole from any topologically trivial exact solution of the Einstein-Maxwell equations i…