540 citations · 6.4k across the 303 of their papers we have counts for
18 papers · 1 filter
Noether's Theorem and Symmetry
A. K. Halder, Andronikos Paliathanasis, P. G. L. Leach
In Noether's original presentation of her celebrated theorm of 1918 allowance was made for the dependence of the coefficient functions of the differential operator which generated…
Reconstructing the dark matter and dark energy interaction scenarios from observations
Weiqiang Yang, Narayan Banerjee, Andronikos Paliathanasis +1
We consider a class of interacting dark energy models in a flat and nonflat FLRW universe where the interaction is characterized by the modified evolution of the pressureless dark…
Stability of a modified Jordan-Brans-Dicke theory in the dilatonic frame
Genly Leon, Andronikos Paliathanasis, Luisberis Velazquez Abad
We investigate the Jordan-Brans-Dicke action in the cosmological scenario of FLRW spacetime with zero spatially curvature and with an extra scalar field minimally coupled to gravit…
Reduced Lagrangians and analytic solutions in Einstein-æther Cosmology
M. Roumeliotis, A. Paliathanasis, Petros A. Terzis +1
We present the solution space of the field equations in the Einstein-æther theory for the case of a and a LRS Bianchi Type space-time. We also find that there are port…
Exact Solutions in Chiral Cosmology
Andronikos Paliathanasis, Genly Leon, Supriya Pan
In multi-scalar field cosmologies new dynamical degrees of freedom are introduced which can explain the observational phenomena. Unlike the usual scalar field theory where a single…
Szekeres Universes with Homogeneous Scalar Fields
John D. Barrow, Andronikos Paliathanasis
We consider the existence of an "inflaton" described by an homogeneous scalar field in the Szekeres cosmological metric. The gravitational field equations are reduced to two famili…