Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Pailas, T."'
We present, for the first time, the quantization process for the Einstein-aether scalar field cosmology. We consider a cosmological theory proposed as a Lorentz violating inflationary model, where the aether and scalar fields interact through the ass
Externí odkaz:
http://arxiv.org/abs/2008.00746
Autor:
Pailas, T.
A "time"-covariant Schr\"{o}dinger equation is defined for the minisuperspace model of the Reissner-Nordstr\"{o}m (RN) black hole, as a "hybrid" between the "intrinsic time" Schr\"{o}dinger and Wheeler-DeWitt(WDW) equations. To do so, a reduced, regu
Externí odkaz:
http://arxiv.org/abs/2006.08780
Publikováno v:
Phys. Rev. D 102, 063524 (2020)
We find the symmetry generators for the Friedman equations emanating from a perfect fluid source, in the presence of a cosmological constant term. The relevant dynamics is seen to be governed by two coupled, first order ordinary differential equation
Externí odkaz:
http://arxiv.org/abs/2005.11726
Some more general "inheritance conditions" have been found for a given set of symmetry generators $\{\mathbf{Z}_{\bar{l}}\}$ acting on some set of coupled ordinary differential equations, once the "first integration method" has been applied upon some
Externí odkaz:
http://arxiv.org/abs/2002.01195
Autor:
Pailas, T., Christodoulakis, T.
Solutions have been found for gravity coupled to electromagnetic field and a set of charged and uncharged perfect fluids for Bianchi Types VI_{(-1)}, VIII, IX, under the primary assumption of the existence of a conformal Killing vector field. The ele
Externí odkaz:
http://arxiv.org/abs/1903.07473
Autor:
Pailas, T., Dimakis, N., Karagiorgos, A., Terzis, Petros A., Papadopoulos, G. O., Christodoulakis, T.
The general classical solution of the 3D electromagnetic pp-wave spacetime has been obtained. The relevant line element contains an arbitrary essential function providing an infinite number of in-equivalent geometries as solutions. A classification i
Externí odkaz:
http://arxiv.org/abs/1901.08243
Autor:
Karagiorgos, A., Pailas, T., Dimakis, N., Papadopoulos, G. O., Terzis, Petros A., Christodoulakis, T.
In the present work we revisit the axisymmetric Bianchi VIII and IX models. At the classical level we reproduce the known analytic solution, in a novel way making use of two quadratic integrals of motion, the constraint equation, as well as a linear
Externí odkaz:
http://arxiv.org/abs/1812.10879
We consider the 4+1 Einstein's field equations (EFE's) in vacuum, simplified by the assumption that there is a four-dimensional sub-manifold on which an isometry group of dimension four acts simply transitive. In particular we consider the Abelian gr
Externí odkaz:
http://arxiv.org/abs/1802.09044
We consider a Bianchi type III axisymmetric geometry in the presence of an electromagnetic field. A first result at the classical level is that the symmetry of the geometry need not be applied on the electromagnetic tensor $F_{\mu\nu}$; the algebraic
Externí odkaz:
http://arxiv.org/abs/1710.02032
Publikováno v:
Phys. Rev. D 95, 086016 (2017)
We start from a static, spherically symmetric space-time in the presence of an electrostatic field and construct the mini-superspace Lagrangian that reproduces the well known Reissner - Nordstr\"om solution. We identify the classical integrals of mot
Externí odkaz:
http://arxiv.org/abs/1703.05292