112 citations · 989 across the 71 of their papers we have counts for
47 papers · 1 filter
Possible relationship between initial conditions for inflation and past geodesic incompleteness of the inflationary spacetime
Alexander Kaganovich
According to the Borde-Guth-Vilenkin (BGV) theorem an expanding region of spacetime cannot be extended to the past beyond some boundary \mathcal{B}. Therefore, the inflationary uni…
Mirror-extended standard model with spontaneously broken left-right symmetry and its implementation in the course of cosmological evolution
Alexander B. Kaganovich
A mirror-extended standard model (MESM) is offered, where in the left-right symmetric underlying action the sector of the standard model (SM) and its mirror copy have the same SU(2…
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.…
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…
Gravity, Nonlinear Gauge Fields and Charge Confinement/Deconfinement
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We discuss in some detail the properties of gravity (including f(R)-gravity) coupled to non-standard nonlinear gauge field system containing a square root of the usual Maxwell Lagr…
Dynamical Couplings, Dynamical Vacuum Energy and Confinement/Deconfinement from R^2-Gravity
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We study within Palatini formalism an f(R)-gravity with f(R)= R + αR^2 interacting with a dilaton and a special kind of nonlinear gauge field system containing a square-root of the…
Lightlike Braneworlds in Anti-de Sitter Bulk Space-times
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We consider five-dimensional Einstein-Maxwell-Kalb-Ramond system self-consistently coupled to a lightlike 3-brane, where the latter acts as material, charge and variable cosmologic…
Hiding and Confining Charges via "Tube-like" Wormholes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We describe two interesting effects in wormhole physics. First, we find that a genuinely charged matter source may appear neutral to an external observer - a phenomenon opposite to…
Hiding Charge in a Wormhole
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
Existence of wormholes can lead to a host of new effects like Misner-Wheeler "charge without charge" effect, where without being generated by any source an electric flux arrives fr…
Asymptotically de Sitter and anti-de Sitter Black Holes with Confining Electric Potential
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We study gravity interacting with a special kind of QCD-inspired nonlinear gauge field system which earlier was shown to yield confinement-type effective potential (the "Cornell po…
Space-Time Compactification, Non-Singular Black Holes, Wormholes and Braneworlds via Lightlike Branes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We describe a concise general scheme for constructing solutions of Einstein-Maxwell-Kalb-Ramond gravity-matter system in bulk space-time interacting self-consistently with one or m…
Space-Time Compactification/Decompactification Transitions Via Lightlike Branes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We consider Einstein-Maxwell-Kalb-Ramond gravity-matter system in bulk space-time interacting self-consistently with two (widely separated) codimension-one electrically charged lig…
Space-Time Compactification Induced By Lightlike Branes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
The aim of the present paper is two-fold. First we describe the Lagrangian dynamics of a recently proposed new class of lightlike p-branes and their interactions with bulk space-ti…
Asymmetric Wormholes via Electrically Charged Lightlike Branes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We consider a self-consistent Einstein-Maxwell-Kalb-Ramond system in the bulk D=4 space-time interacting with a variable-tension electrically charged lightlike brane. The latter se…
Non-singular black holes from gravity-matter-brane lagrangians
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We consider self-consistent coupling of bulk Einstein-Maxwell-Kalb-Ramond system to codimension-one charged lightlike p-brane with dynamical (variable) tension (LL-brane). The latt…
Spherically Symmetric and Rotating Wormholes Produced by Lightlike Branes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
Lightlike p-branes (LL-branes) with dynamical (variable) tension allow simple and elegant Polyakov-type and dual to it Nambu-Goto-like world-volume action formulations. Here we fir…
Einstein-Rosen "Bridge" Needs Lightlike Brane Source
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
The Einstein-Rosen "bridge" wormhole solution proposed in the classic paper [1] does not satisfy the vacuum Einstein equations at the wormhole throat. We show that the fully consis…
Lightlike Branes as Natural Candidates for Wormhole Throats
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We first briefly present a consistent world-volume Lagrangian description of lightlike p-branes (LL-branes) in two equivalent forms - a Polyakov-type and a dual to it Nambu-Goto-ty…
Lightlike Brane as a Gravitational Source of Misner-Wheeler-Type Wormhole
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
Consistent Lagrangian description of lightlike p-branes (LL-branes) is presented in two equivalent forms - a Polyakov-type formulation and a dual to it Nambu-Goto-type formulation.…
Lightlike p-Branes: Mass "Inflation" and Lightlike Braneworlds
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
Lagrangian description of lightlike p-branes is presented in two equivalent forms - a Polyakov-type formulation and a dual to it Nambu-Goto-type formulation. Next, the properties o…
Lightlike Braneworlds
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We propose a new class of p-brane models describing intrinsically lightlike branes in any world-volume dimensions. Properties of the dynamics of these lightlike p-branes in various…
"Mass Inflation" With Lightlike Branes
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov +1
We discuss properties of a new class of p-brane models, describing intrinsically lightlike branes for any world-volume dimension, in various gravitational backgrounds of interest i…
Symmetry Supporting a Transition to Zero Cosmological Constant State
E. I. Guendelman, A. B. Kaganovich
In a number of previous publications we demonstrated that the Two Measures Field Theory (TMT) enables to resolve the old cosmological constant (CC) problem avoiding the Weinberg's…