Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Gangopadhyay, Mayukh R."'
The Cosmic Microwave Background (CMB) observations results reported by {\it Planck} satellite suggest a plateau characteristic in the flat potential of the inflaton field is favored to drive the Universe's early acceleration. On that note, Power Law
Externí odkaz:
http://arxiv.org/abs/2408.01670
In loop quantum cosmology, the slow-roll inflation is generic, and when the kinetic energy of the scalar field dominates at the bounce, the evolution of the Friedmann-Lema\^itre-Robertson-Walker universe will go through three distinguishable epochs,
Externí odkaz:
http://arxiv.org/abs/2408.00316
A scale-independent energy-momentum squared gravity (EMSG) allows different gravitational couplings for different types of sources and has been proven to have interesting implications in cosmology. In this paper, the Big Bang Nucleosynthesis (BBN) fo
Externí odkaz:
http://arxiv.org/abs/2402.01210
We analyze the spectrum of gravitational waves generated by the induced spectrum of tensor fluctuation during warm natural inflation. In our previous work it has been demonstrated that an epoch of warm natural inflation can lead to cosmologically rel
Externí odkaz:
http://arxiv.org/abs/2306.09641
We study the late-time cosmological tensions using the low-redshift background and redshift-space distortion data by employing a machine learning (ML) technique. By comparing the generated observables with the standard cosmological scenario, our find
Externí odkaz:
http://arxiv.org/abs/2303.07301
Publikováno v:
Eur. Phys. J. C 84 (2024) 884
We examine the possibility of Primordial Black Holes (PBHs) formation in single-field models of inflation. Using the adiabatic or wave function renormalization scheme in the short-range modes, we show that one-loop correction to the power spectrum is
Externí odkaz:
http://arxiv.org/abs/2301.10000
Publikováno v:
Phys.Rev.D 107 (2023) 10, 103530
The $\alpha$-attractor models are some of the most interesting models of inflation from the point of view of upcoming observations in cosmology and also attractive from the point of view of supergravity. We confront representative models of exponenti
Externí odkaz:
http://arxiv.org/abs/2212.13363
We consider a scenario of large-scale modification of gravity that does not invoke extra degrees of freedom but includes coupling between baryonic matter and dark matter in the Einstein frame. The total matter energy density follows the standard cons
Externí odkaz:
http://arxiv.org/abs/2211.12041
Publikováno v:
Physics Letters B 835 (2022) 137510
We report on a study of the natural warm inflationary paradigm (WNI). We show two important new results arise in this model. One is that the observational constraints on the primordial power spectrum from the cosmic microwave background (CMB) can be
Externí odkaz:
http://arxiv.org/abs/2207.10394
We study two of the most theoretically promising models of inflation, namely the Natural inflation and the Mutated Hilltop inflation, in the Einstein-Gauss Bonnet(EGB) gravity framework. In this work, we try to explore these models in EGB framework,
Externí odkaz:
http://arxiv.org/abs/2205.15261