53 papers
Early- and late-time constraints on Wald-Gauss-Bonnet topological dark energy and implications for the and tensions
Stylianos A. Tsilioukas, Fotios K. Anagnostopoulos, Spyros Basilakos +2
The paper investigates Wald‑Gauss‑Bonnet topological dark energy as a late‑time modification to the expansion history, performing early‑ and late‑Universe data analyses that show i…
Classical Symmetries and Painleve Analysis for the (1+3) Kudryashov-Sinelshchikov Equation
Amlan K Halder, Rajeswari Seshadri, A Paliathanasis +1
The paper investigates the integrability of the (1+3)-dimensional Kudryashov‑Sinelshchikov equation by analyzing its Lie point symmetries and applying Painlevé singularity analysis…
Compact Stars in Symmetric Teleparallel Scalar-Tensor Gravity
Grigorios Panotopoulos, Andrés Lueiza-ColipÃ, Nikolaos Dimakis +1
We investigate the existence of static, spherically symmetric compact objects within the framework of symmetric teleparallel scalar-tensor gravity. This theory extends the Brans-Di…
Asymptotic Solutions of Radiating Stars
R. S. Bogadi, G. Leon, M. Govender +3
We investigate the evolution of the surface of radiating stars by studying the asymptotic behaviour of exact solutions initiated via the stationary boundary condition. This boundar…
Noncoincidence -Cosmology with Dark Matter Coupled to Gravity
A. Abebe, P. S. Apostolopoulos, A. Giacomini +3
We investigate FLRW cosmology in the framework of symmetric teleparallel gravity with a nonminimal coupling between dark matter and the gravitational field. In the noncoinci…
Dirac-Bergmann algorithm and canonical quantization of -essence cosmology
Andrés Lueiza-ColipÃ, Andronikos Paliathanasis, Nikolaos Dimakis
We develop a general canonical quantization scheme for -essence cosmology in scalar-tensor theory. Utilizing the Dirac-Bergmann algorithm, we construct the Hamiltonian associate…