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f(R)-Gravity: "Einstein Frame" Lagrangian Formulation, Non-Standard Black Holes and QCD-like Confinement/Deconfinement
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We consider f(R) = R + R^2 gravity interacting with a dilaton and a special non-standard form of nonlinear electrodynamics containing a square-root of ordinary Maxwell Lagrangian.…
Confining Boundary conditions from dynamical Coupling Constants
E. I. Guendelman, R. Steiner
It is shown that it is possible to consistently and gauge invariantly formulate models where the coupling constant is a non trivial function of a scalar field . In the case…
Dynamical Volume Element in Scale-Invariant and Supergravity Theories
Eduardo Guendelman, Emil Nissimov, Svetlana Pacheva +1
The use in the action integral of a volume element of the form , where is a metric-independent measure density, can yield new interesting results in all types of known…
Dynamical Couplings and Charge Confinement/Deconfinement from Gravity Coupled to Nonlinear Gauge Fields
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We briefly outline several main results concerning various new physically relevant features found in gravity -- both ordinary Einstein or gravity in the first-order fo…
Lightlike Membranes in Black Hole and Wormhole Physics, and Cosmology
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We shortly outline the principal results concerning the reparametrization-invariant world-volume Lagrangian formulation of lightlike brane dynamics and its impact as a source for g…
Charge-Confining Gravitational Electrovacuum Shock Wave
Eduardo Guendelman, Emil Nissimov, Svetlana Pacheva
In previous publications we have extensively studied spherically symmetric solutions of gravity coupled to a non-standard type of non-linear electrodynamics containing a square roo…