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Differences between scalar field and scalar density solutions [PDF]
Canadian Journal of Physics, 2007 We explore differences between scalar field, and scalar density solutions by using Robertson-Walker (RW) metric, and also a non-relativistic Hamiltonian is derived for a scalar density field in the post-Newtonian approximation.
Pirinççioglu, Nurettin, Sert, Ilker
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Scalar Field Inhomogeneous Cosmologies [PDF]
Journal of Mathematical Physics, 1995 Some exact solutions for the Einstein field equations corresponding to inhomogeneous $G_2$ cosmologies with an exponential-potential scalar field which generalize solutions obtained previously are considered.
Feinstein, A., Ibáñez, J., Labraga, P.
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Scalar Perturbations in Scalar Field Quantum Cosmology [PDF]
Physical Review D, 2009 In this paper it is shown how to obtain the simplest equations for the Mukhanov-Sasaki variables describing quantum linear scalar perturbations in the case of scalar fields without potential term.
B. Hatfield +4 more
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Stability of a noncanonical scalar field model during cosmological date [PDF]
arXiv, 2015 Using the non-canonical model of scalar field, the cosmological consequences of a pervasive, self-interacting, homogeneous and rolling scalar field are studied.
Golanbari, T. +3 more
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Exact Conformal Scalar Field Cosmologies [PDF]
, 1994 New exact solutions of Einstein's gravity coupled to a self-interacting conformal scalar field are derived in this work. Our approach extends a solution-generating technique originally introduced by Bekenstein for massless conformal scalar fields ...
Abramowitz M +21 more
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Expanding and Collapsing Scalar Field Thin Shell [PDF]
Gen. Relativ. Gravit. 44(2012)2353-2364, 2012 This paper deals with the dynamics of scalar field thin shell in the Reissner-Nordstr$\ddot{o}$m geometry. The Israel junction conditions between Reissner-Nordstr$\ddot{o}$m spacetimes are derived, which lead to the equation of motion of scalar field ...
C. Gundlach +32 more
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Rotating Scalar Field Wormhole [PDF]
Classical and Quantum Gravity, 2006 We derive an exact solution to the Einstein's equations with a stress-energy tensor corresponding to an opposite-sign scalar field, and show that such a solution describes the internal region of a rotating wormhole.
Matos, Tonatiuh, Nunez, Dario
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, 2018 With a suitable decomposition of its energy-momentum tensor into pressureless matter and a vacuum type term, we investigate the spherical gravitational collapse of a minimally coupled, self-interacting scalar field, showing that it collapses to a ...
Carneiro, S., Fabris, J. C.
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Massive scalar states localized on a de Sitter brane [PDF]
, 2003 We consider a brane scenario with a massive scalar field in the five-dimensional bulk. We study the scalar states that are localized on the brane, which is assumed to be de Sitter. These localized scalar modes are massive in general, their effective four-
D. Langlois +21 more
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The Einstein-Friedrich-nonlinear scalar field system and the stability of scalar field Cosmologies [PDF]
, 2017 A frame representation is used to derive a first order quasi-linear symmetric hyperbolic system for a scalar field minimally coupled to gravity. This procedure is inspired by similar evolution equations introduced by Friedrich to study the Einstein-Euler
Alho, Artur +2 more
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