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11 papers · 1 filter
Thermodynamics in a Modified Gravity Involving Higher-Order Torsion Derivative Terms
Saira Waheed, M. Zubair
The present study is elaborated to investigate the validity of thermodynamical laws in a modified teleparallel gravity based on higher-order derivatives terms of torsion scalar. Fo…
Global Minimality in Constrained Inverse Source Problems for Complex Electromagnetic Media
M. R. Khodja
Global minimality, boundedness, and uniqueness are established for a general, physically motivated class of inverse source problems in non-homogeneous electromagnetic media with ge…
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…
The past and future dynamics of quintom dark energy models
Genly Leon, Andronikos Paliathanasis, Jorge Luis Morales-Martínez
We study the phase space of the quintom cosmologies for a class of exponential potentials. We combine normal forms expansions and the center manifold theory in order to describe th…
First-principles calculations of Sc2CdS4 and Y2CdS4 compounds
Abdul Ahad Khan, Zubaida Noor, G. Murtaza
Direct energy bandgap materials are crucial for the efficient optoelectronics devices. Therefore, the investigation of new direct gap materials is important. In the present work, t…
Quadratic conservation laws and collineations: a discussion
Leonidas Karpathopoulos, Michael Tsamparlis, Andronikos Paliathanasis
Every second order system of autonomous differential equations can be described by an autonomous holonomic dynamical system with a Lagrangian part, an effective potential and a set…