74 citations · 194 across the 14 of their papers we have counts for
14 papers
Interacting Tachyonic Scalar Field III
Tanisha Joshi, S. D Pathak
This study explores the plausibility of an interacting tachyonic scalar, homogeneous in nature, as a promising candidate for dynamic dark energy, offering insights into the observe…
Evolution of Entropy with Cosmic Time
Tanisha Joshi, S. D Pathak
Understanding the evolution of entropy in the universe is a fundamental aspect of cosmology. This paper investigates the evolution of entropy in a spatially flat universe, fo…
Interacting tachyonic scalar field II
V K Ojha, Adithya A Rao, S D Pathak
The existence of dark energy is essential to explain the cosmic accelerated expansion. We consider a homogenous interacting tachyonic scalar field as a possible candidate for the d…
Interacting tachyonic scalar field
A Kundu, S D Pathak, V K Ojha
We discuss the coupling between dark energy and matter by considering a homogeneous tachyonic scalar field as a candidate for dark energy. We obtained the functional form of scale…
Production and constraints for a massive dark photon at electron-positron colliders
Jun Jiang, Chun-Yuan Li, Shi-Yuan Li +3
Dark sector may couple to the Standard Model via one or more mediator particles. We discuss two types of mediators: the dark photon and the dark scalar mediator . T…
Dynamics of coupled phantom and tachyon fields
M. Shahalam, S. D. Pathak, Shiyuan Li +2
In this paper, we apply the dynamical analysis to a coupled phantom field with scaling potential taking particular forms of the coupling (linear and combination of linear), and pre…
Thermodynamics of interacting tachyonic scalar field
S. D. Pathak, M. M. Verma, Shiyuan Li
In this paper we discuss the laws of thermodynamics for interacting tachyonic scalar field. The components of the tachyonic scalar field in the universe are taken to exist in the s…
Dynamics of interacting quintessence
M. Shahalam, S. D. Pathak, M. M. Verma +2
In this paper, we investigate coupled quintessence with scaling potential assuming specific forms of the coupling as namely, , and $σ(\dot{ρ_m}+\dot{ρ_…
Nonsingular Bouncing Model in Closed and Open universe
Manabendra Sharma
We investigate the cosmology of a class of model with noncanonical scalar field and matter both in FRW closed and open background. Writing the Einstein Equations in terms of dimens…
The BICEP2 data and a single Higgs-like interacting tachyonic field
Murli Manohar Verma, Shankar Dayal Pathak
It is proposed that the recently announced BICEP2 value of tensor-to scalar ratio can be explained as containing an extra contribution from the recent acceleration of th…
Cosmic expansion driven by real scalar field for different forms of potential
Murli Manohar Verma, Shankar Dayal Pathak
We discuss the expansion of the universe in the FRLW model assuming that the source of dark energy is either tachyonic scalar field or quintessence. The tachyonic scalar field with…
Evolution of the equation of state parameters of cosmological tachyonic field components through mutual interaction
Murli Manohar Verma, Shankar Dayal Pathak
We study the perturbed equation of state (EOS) parameters of the cosmological tachyonic scalar field components and their mutual time-dependent interaction. It is shown that the di…
Evolution of shifted cosmological parameter and shifted dust matter in a two-phase tachyonic field universe
Murli Manohar Verma, Shankar Dayal Pathak
We propose a model of the evolution of the tachyonic scalar field over two phases in the universe. The field components do not interact in phase I, while in the subsequent phase II…
A tachyonic scalar field with mutually interacting components
Murli Manohar Verma, Shankar Dayal Pathak
We investigate the tachyonic cosmological potential in two different cases of the quasi-exponential expansion of universe and discuss various forms of interaction between th…