40 citations · 89 across the 10 of their papers we have counts for
10 papers
Time-covariant Schrödinger equation and invariant decay probability: The -Kantowski-Sachs universe
Theodoros Pailas, N. Dimakis, Petros A. Terzis +1
The system under study is the -Kantowski-Sachs universe. Its canonical quantization is provided based on a recently developed method: the singular minisuperspace Lagrangian desc…
Quantization of Einstein-aether Scalar field Cosmology
N. Dimakis, T. Pailas, A. Paliathanasis +3
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 inflation…
"Time"-covariant Schrödinger equation and the canonical quantization of the Reissner-Nordström black hole
T. Pailas
A "time"-covariant Schrödinger equation is defined for the minisuperspace model of the Reissner-Nordström (RN) black hole, as a "hybrid" between the "intrinsic time" Schrödinger an…
Infinite dimensional symmetry groups of the Friedmann equations
T. Pailas, N. Dimakis, Andronikos Paliathanasis +2
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…
On solvable Lie algebras and integration method of ordinary differential equations
T. Pailas, P. A. Terzis, T. Christodoulakis
Some more general "inheritance conditions" have been found for a given set of symmetry generators acting on some set of coupled ordinary differential equ…
Classical and quantum analysis of 3D electromagnetic pp-wave spacetime
T. Pailas, N. Dimakis, A. Karagiorgos +3
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 infini…
Quantum cosmology of Bianchi VIII, IX LRS geometries
A. Karagiorgos, T. Pailas, N. Dimakis +3
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 quadra…
The solution space to the Einstein's vacuum field equations for the case of five-dimensional Bianchi Type I (Type 4A1)
T. Pailas, Petros A. Terzis, T. Christodoulakis
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…
Discrete spectrum of the quantum Reissner - Nordström geometry
N. Dimakis, A. Karagiorgos, T. Pailas +2
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 Reiss…
Conditional symmetries in axisymmetric quantum cosmologies with scalar fields and the fate of the classical singularities
Adamantia Zampeli, Theodoros Pailas, Petros A. Terzis +1
In this paper, the classical and quantum solutions of some axisymmetric cosmologies coupled to a massless scalar field are studied in the context of minisuperspace approximation. I…