68 citations · 442 across the 53 of their papers we have counts for
54 papers
Horizon energy fluctuations beyond Einstein's gravity: Gauss-Bonnet, Lovelock and Quantum deformed frameworks
P. B. Krishna, Lini Devassy, Titus K. Mathew
We study thermal energy fluctuations of cosmological horizons within the canonical ensemble framework, treating the horizon as a thermodynamic system characterized by temperature a…
Generalized Mass-to-Horizon Entropy and Horizon Thermodynamics
Smeehan S Shameeem, Priyesh K, Krishna P. B +1
We investigate the cosmological implications of generalized mass-to-horizon entropy, a two-parameter extension of the standard Bekenstein entropy based on the mass-to-horizon relat…
Subtleties in non-equilibrium horizon thermodynamics of modified gravity theories
Vishnu A Pai, Vishnu S Namboothiri, Titus K Mathew
Thermodynamic interpretations of gravity often arise from applying the Clausius relation to spacetime horizons. In modified gravity theories with higher-order equations of motion,…
Cosmology with non-linear barotropic Israel-Stewart fluid with causal relaxation time
Vishnu A Pai, Titus K Mathew
We derive an extended expression for the relaxation time of a barotropic Israel-Stewart (IS) fluid using the non-linear causality constraint, and propose a new formulation for mode…
vCF: Extending CDM into a Unified Model with Particle Creation
Vishnu A Pai, Titus K Mathew
We present a novel extended version of the CDM model that provides analytical solution for Hubble parameter uniting all epochs of cosmic evolution starting from inflation to lat…
Dissipative CDM model with causal sign-switching bulk viscous pressure
Vishnu A Pai, Sarath N, Titus K Mathew
Extending the standard CDM model by considering dissipative effects within a causal viscous framework, and obtaining an analytical solution for the Hubble parameter remains a ch…
Emergence of space from the first law of thermodynamics in the braneworld scenarios
Krishna P. B., Adithya P S, Titus K. Mathew
Expansion of the universe is caused by the departure from the holographic equipartition. This principle, the law of emergence, first postulated in the context of Einstein's gravity…
Evolution of fluctuations in horizon energy and its dependence on the degrees of freedom
Vishnu S Namboothiri, Krishna P B, Adithya P S +1
Taking account of the thermal nature of the Hubble horizon of the expanding universe, we analysed the evolution of relative fluctuations of horizon energy. For this analysis, we us…
Bulk viscous late acceleration under near equilibrium conditions in f(R, T) gravity with mixed matter
Vishnu A Pai, Titus K Mathew
Various studies have shown that the late acceleration of the universe can be caused by the bulk viscosity associated with dark matter. But recently, it was indicated that a cosmolo…
Constraining the bulk viscous coefficients in a viscous universe with cosmological constant
Athira Sasidharan, Titus K Mathew
In this paper we consider dissipative effects in CDM model, i.e., we consider a universe with cosmological constant having viscous matter. We assume the most general form for bu…
Near Equilibrium Constraints on Bulk Viscous Models in Gravity
Vishnu A Pai, Titus K Mathew
Recent studies indicate that, near equilibrium condition could not be maintained for bulk viscous matter models during the accelerated expansion of the universe in the context of E…
Emergence of cosmic space with Barrow entropy, in non-equilibrium thermodynamic conditions
Nandhida Krishnan. P, Titus K Mathew
Recently, Barrow accounts for the quantum gravitational effects to the black hole surface. Thus the conventional area-entropy relation has modified, with an…
Thermal evolution and stability analysis of phenomenologically emergent dark energy model
Rosemin John, Sarath N., Titus K. Mathew
The phenomenologically emergent dark energy (PEDE) model is a varying dark energy model with no extra degrees of freedom proposed by Li and Shafieloo\citep{Li_2019} to alleviate th…
Emergence of cosmic space in Tsallis modified gravity from equilibrium and non-equilibrium thermodynamic perspective
M. Dheepika, Hassan Basari V. T., Titus K. Mathew
In this paper, we obtain the law of emergence with Tsallis entropy from the thermodynamic laws. We first derive the law of emergence from the equilibrium description of the unified…
Geometric phases in neutrino mixing
Manosh T. M., N. Shaji, Ramesh Babu Thayyullathil +1
Neutrinos can acquire both dynamic and geometric phases due to the non-trivial mixing between mass and flavour eigenstates. In this article, we derive the general expressions for a…
Modified expansion law with Kodama-Hayward temperature for the horizon
Muhsinath. M, Hassan Basari V. T., Titus K. Mathew
The expansion law proposed by Padmanabhan suggests that the evolution of the volume of the horizon is due to the difference between the degrees of freedom on the horizon and the de…
Unified formalism for the emergence of space from the first law of thermodynamics
Hassan Basari V. T., P. B. Krishna, Titus K. Mathew
We derive a unified expansion law for our universe from the first law of thermodynamics on the apparent horizon, where entropic evolution depicts the emergence of cosmic space. The…
Holographic dark energy from the laws of thermodynamics with Rényi entropy
Manosh T. Manoharan, N. Shaji, Titus K. Mathew
This article investigates the relationship between the holographic principle and the laws of thermodynamics in explaining the late-time acceleration of the universe. First, we expl…
Emergence of cosmic space and its connection with thermodynamic principles
P. B. Krishna, Hassan Basari V. T., Titus K Mathew
The recent research on the connection between gravity and thermodynamics suggests that gravity could be an emergent phenomenon. Following this, Padmanabhan proposed a novel idea th…
Running vacuum cosmology with bulk viscous matter
Sarath N, Jerin Mohan N D, Titus K Mathew
We study the late acceleration of the universe by incorporating bulk viscous matter with the running vacuum. The vacuum energy density varies as the squares of the Hubble parameter…
Barrow Holographic Dark Energy Model with GO Cut-off -- An Alternative Perspective
Nandhida Krishnan. P, Titus K Mathew
Recently, Barrow holographic dark energy (BHDE), based on Barrow entropy, has been proposed to describe the late acceleration of the universe. Contrary to the earlier analysis of t…
Emergence of space from non-equilibrium thermodynamics in f(R) gravity
Hassan Basari V. T., P. B. Krishna, Titus K. Mathew
It has shown that the accelerated expansion of the FRW Universe can be explained as the quest towards the holographic equipartition (), satisfies the expansion…
Tsallis Holographic Dark Energy Reconsidered
M. Dheepika, Titus K. Mathew
We consider the interacting Tsallis Holographic Dark Energy (THDE), with the Granda-Oliveros (GO) scale as the infrared (IR) cutoff, as dynamical vacuum. We analytically solved for…
Contrasting the bulk viscous model with the standard CDM using Bayesian statistics
V Mohammed Shareef, ND Jerin Mohan, Titus K Mathew
Causal dissipative model is a plausible choice to explain the late accelerated epoch of universe. At the same time CDM is considered to be standard model to explain the cosmolog…