540 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- A. Paliathanasis2 profiles185 · h 42
- G. Leon2 profiles55 · h 31
- M. Govender2 profiles30 · h 21
- M. Znojil2 profiles27 · h 34
- K. G. Zloshchastiev26 · h 18
- P. Leach4 profiles22 · h 15
- S. Pan22 · h 46
- Supriya Pan3 profiles21 · h 14
- Weiqiang Yang2 profiles21 · h 42
- N. Dimakis2 profiles19 · h 21
- A. Giacomini2 profiles13 · h 19
- E. di Valentino10 · h 2
- Austral University of ChileCL111 papers
- Universidad Católica del NorteCL85 papers
- Presidency UniversityIN34 papers
- University of KwaZulu-NatalZA34 papers
- National and Kapodistrian University of AthensGR26 papers
- University of Hradec KrálovéCZ25 papers
- Czech Academy of Sciences, Nuclear Physics InstituteCZ24 papers
- Liaoning Normal UniversityCN22 papers
- National Institute for Theoretical PhysicsZA22 papers
- University of SheffieldGB16 papers
- National Observatory of AthensGR14 papers
- North-West UniversityZA14 papers
21 papers · 1 filter
Exact solution of the Einstein-Skyrme model in a Kantowski-Sachs spacetime
Andronikos Paliathanasis, Michael Tsamparlis
We consider a Skyrme fluid with a constant radial profile in locally rotational Kantowski-Sachs spacetime. The Skyrme fluid is an anisotropic fluid with zero heat flux and with an…
Linear Quantum Entropy and Non-Hermitian Hamiltonians
Alessandro Sergi, Paolo V. Giaquinta
We consider the description of open quantum systems with probability sinks (or sources) in terms of general non-Hermitian Hamiltonians.~Within such a framework, we study novel poss…
Topologically nontrivial solution in Einstein-Dirac gravity on the Hopf bundle
Vladimir Dzhunushaliev
The topologically nontrivial solution in Einstein-Dirac gravity with cosmological constant is obtained. The spacetime has the Hopf bundle as a spatial section. It is shown that the…
Solution of the Master Equation for Quantum Brownian Motion given by the Schrödinger Equation
R. Sinuvasan, A. Paliathanasis, R. M. Morris +1
We consider the master equation of quantum Brownian motion and with the application of the group invariant transformation we show that there exists a surface on which the solution…
Singularity-free model of electrically charged fermionic particles and gauged Q-balls
Vladimir Dzhunushaliev, Arislan Makhmudov, Konstantin G. Zloshchastiev
We propose a model of an electrically charged fermion as a regular localized solution of electromagnetic and spinor fields interacting with a physical vacuum, which is phenomenolog…
Calculation of gluon contribution to the proton spin by using the non-perturbative quantization à la Heisenberg
Vladimir Dzhunushaliev
The contribution of crossed gluon fields in flux tubes connecting quarks to the proton spin is calculated. The calculations are performed following non-perturbative Heisenberg's qu…
Physical viability of fluid spheres satisfying the Karmarkar condition
Ksh. Newton Singh, Neeraj Pant, M. Govender
We obtain a new solution of the TOV-equation for an anisotropic fluid distribution by imposing the Karmarkar condition. In order to close the system of equations we postulate an in…
Anisotropic compact stars in Karmarkar spacetime
Ksh. Newton Singh, Neeraj Pant, M. Govender
We present a new class of solutions to the Einstein field equations for an anisotropic matter distribution in which the interior space-time obeys the Karmarkar condition. The neces…
Quantum-statistical approach to electromagnetic wave propagation and dissipation inside dielectric media and nanophotonic and plasmonic waveguides
Konstantin G. Zloshchastiev
Quantum-statistical effects occur during the propagation of electromagnetic (EM) waves inside the dielectric media or metamaterials, which include a large class of nanophotonic and…
Symmetrized exponential oscillator
Miloslav Znojil
Several properties of bound states in potential are studied. Firstly, with the emphasis on the reliability of our arbitrary-precision construction, wave func…
Noetherian symmetries of noncentral forces with drag term
A. Ghose-Choudhury, Partha Guha, Andronikos Paliathanasis +1
We consider the Noetherian symmetries of second-order ODEs subjected to forces with nonzero curl. Both position and velocity dependent forces are considered. In the former case the…
A comparative study between EGB gravity and GTR by modelling compact stars
Piyali Bhar, Megan Govender, Ranjan Sharma
In this paper we utilise the Krori-Barua ansatz to model compact stars within the framework of Einstein- Gauss-Bonnet (EGB) gravity. The thrust of our investigation is to carry out…
Cosmological Solutions of Gravity
Andronikos Paliathanasis, John D. Barrow, P. G. L. Leach
In the cosmological scenario in gravity, we find analytical solutions for an isotropic and homogeneous universe containing a dust fluid and radiation and for an…
HIRAX: A Probe of Dark Energy and Radio Transients
L. B. Newburgh, K. Bandura, M. A. Bucher +33
The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) is a new 400-800MHz radio interferometer under development for deployment in South Africa. HIRAX will comprise 1024…
Analytical solutions in cosmology from singularity analysis
Andronikos Paliathanasis, P. G. L. Leach
The integrability of higher-order theories of gravity is of importance in the determining the properties of these models and so their viability as models of reality. An important t…
The algebraic properties of the space- and time-dependent one-factor model of commodities
A. Paliathanasis, R. M. Morris, P. G. L. Leach
We consider the one-factor model of commodities for which the parameters of the model depend upon the stock price or on the time. For that model we study the existence of group-inv…
Nonlinear Ordinary Differential Equations: A discussion on Symmetries and Singularities
Andronikos Paliathanasis, P. G. L. Leach
Two essential methods, the symmetry analysis and of the singularity analysis, for the study of the integrability of nonlinear ordinary differential equations are discussed. The mai…
Lie symmetries of (1+2) nonautonomous evolution equations in Financial Mathematics
A. Paliathanasis, R. M. Morris, P. G. L. Leach
We analyse two classes of evolution equations which are of special interest in Financial Mathematics, namely the Two-dimensional Black-Scholes Equation and the equation for…
The Influence of Initial Conditions during Dissipative Collapse
Nolene Ferrari Naidu, Megan Govender
Starting off with two distinct initially static stellar cores (i) Florides interior (constant density, vanishing radial pressure) and (ii) Wyman interior (constant density, nonvani…
On the Hojman conservation quantities in Cosmology
A. Paliathanasis, P. G. L. Leach, S. Capozziello
We discuss the application of the Hojman's Symmetry Approach for the determination of conservation laws in Cosmology, which has been recently applied by various authors in differen…
An observation on Classification of Lie point symmetries for quadratic Liénard type equation [JMP 54, 053506 (2013)] and its erratum [JMP 55, 059901 (2014)]
A. Paliathanasis, P. G. L. Leach
We demonstrate a simplification of some recent works on the classification of the Lie symmetries for a quadratic equation of Liénard type. We observe that the problem could have be…