75 citations · 586 across the 37 of their papers we have counts for
38 papers
One Feature, Three Clocks: Phase-Locked Gravitational Waves, Primordial Black Holes, and Non-Gaussianity from Periodic Warm Inflation
Mayukh R. Gangopadhyay
A shift-symmetric inflaton dissipating into a thermal bath couples to that bath periodically, so its friction oscillates as the field rolls. We follow what this does to warm inflat…
Constraining Quintessential Inflation with ACT: A Gauss-Bonnet Gateway
Yogesh, Imtiyaz Ahmad Bhat, Mayukh R. Gangopadhyay +1
Recent results from the Atacama Cosmology Telescope (ACT), indicating a higher and more tightly constrained scalar spectral index, , place several inflatio…
Warm Inflation Beyond the Markovian Limit
Mayukh R. Gangopadhyay, Nilanjana Kumar
Warm inflation is commonly studied under the assumption that the stochastic force sourcing inflaton fluctuations is Markovian. Realistic thermal systems, however, possess finite re…
Primordial Black Hole Formation in Rastall Gravity: Shifted Collapse Threshold and Exponential Abundance Sensitivity
Mayukh R. Gangopadhyay
Primordial black holes formed in the early universe are compelling candidates for dark matter. We investigate their production in Rastall gravity, a modification of general relativ…
Constraining Anisotropic Universe Through Big Bang Nucleosynthesis: A Case Study of The Bianchi Type-I Universe
Jiwon Park, Sourav Mridha, Dukjae Jang +2
The isotropy and homogeneity of our Universe are the cardinal principles of modern cosmology built on the definition of metric through the prescription by Friedmann-Lematr…
Inflationary Dynamics in Einstein-Gauss-Bonnet Gravity Using New Slow-Roll Approximations considering Generalised Reheating
Yogesh, Imtiyaz Ahmad Bhat, Mayukh R. Gangopadhyay
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 favore…
The Dynamics of Reheating in Loop Quantum Cosmology
Yogesh, Bao-Fei Li, Mayukh R. Gangopadhyay +1
In loop quantum cosmology (LQC), the initial singularity is replaced by a quantum bounce, leading to a universal post-bounce evolution characterized by three distinct epochs: bounc…
Big Bang Nucleosynthesis constraints on the Energy-Momentum Squared Gravity: The model
Dukjae Jang, Mayukh R. Gangopadhyay, Myung-Ki Cheoun +2
Scale-independent energy-momentum squared gravity (EMSG) allows different gravitational couplings for different types of sources and has been proven to have interesting implication…
Is the NANOGrav detection evidence of resonant particle creation during inflation?
M. R. Gangopadhyay, V. V. Godithi, K. Ichiki +5
We show that the recently reported cosmic gravitational wave background by the NANOGrav 15-year collaboration may be the result of resonant particle creation during inflation. For…
Induced Gravitational Waves via Warm Natural Inflation
Miguel Correa, Mayukh R. Gangopadhyay, Nur Jaman +1
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…
Phantom dark energy as a natural selection of evolutionary processes and cosmological tensions
Mayukh R. Gangopadhyay, M. Sami, Mohit K. Sharma
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 g…
No-go for the formation of heavy mass Primordial Black Holes in Single Field Inflation
Sayantan Choudhury, Mayukh R. Gangopadhyay, M. Sami
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-…
Generic modification of gravity, late time acceleration and Hubble tension
Mayukh R. Gangopadhyay, Shibesh K. Jas Pacif, M. Sami +1
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 Ein…
Primordial Black-Hole Dark Matter via Warm Natural Inflation
Miguel Correa, Mayukh R. Gangopadhyay, Nur Jaman +1
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 primor…
A Case Study of Small Field Inflationary Dynamics in the Einstein-Gauss Bonnet Framework in the Light of
Mayukh R. Gangopadhyay, Hussain Ahmed Khan, Yogesh
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 fram…
Composite pseudo Nambu Goldstone Quintessence
Mayukh R. Gangopadhyay, Nilanjana Kumar, Ankan Mukherjee +1
A pseudo-Nambu Goldstone Boson (pNGB) arising from the breaking of a global symmetry () can be one of the most promising candidates for the quintessence model, to e…
The paradigm of warm quintessential inflation and spontaneous baryogenesis
Soumen Basak, Sukannya Bhattacharya, Mayukh R. Gangopadhyay +3
In this paper, we consider a scenario of spontaneous baryogenesis in a framework of warm quintessential inflation where the residual inflaton field, left out after warm inflation,…
Production of Primordial Black Holes via Single Field Inflation and Observational Constraints
Mayukh R. Gangopadhyay, Jayesh C. Jain, Devanshu Sharma +1
In a class of single field models of inflation, the idea of Primordial Black holes(PBHs) production is studied. In this case, the dynamics on small cosmological scales differs sign…
Late time acceleration due to generic modification of gravity and Hubble tension
Shahnawaz A. Adil, Mayukh R. Gangopadhyay, M. Sami +1
We consider a scenario of modified gravity, which is generic to late-time acceleration, namely, acceleration in the Jordan frame and no acceleration in the Einstein frame. The poss…
A paradigm of warm quintessential inflation and production of relic gravity waves
Mayukh R. Gangopadhyay, Shynaray Myrzakul, Mohammad Sami +1
We consider the framework of quintessential inflation in the warm background which is caused by the dissipation of the scalar field energy density into relativistic degrees of free…
Non-thermal Hot Dark Matter from Inflaton/Moduli Decay: The Momentum Distribution and Relaxing the Cosmological Mass Bound
Sukannya Bhattacharya, Subinoy Das, Koushik Dutta +3
Decay of the inflaton or moduli which dominated the energy density of the universe at early times leads to a matter to radiation transition epoch. We consider non-thermal sterile d…
Inflation with a quartic potential in the framework of Einstein-Gauss-Bonnet gravity
Ekaterina O. Pozdeeva, Mayukh Raj Gangopadhyay, Mohammad Sami +2
We investigate inflationary dynamics in the framework of the Einstein-Gauss-Bonnet gravity. In the model under consideration, the inflaton field is non-minimally coupled to the Gau…
Fibre inflation and precision CMB data
Sukannya Bhattacharya, Koushik Dutta, Mayukh Raj Gangopadhyay +2
Generic features of models of inflation obtained from string compactifications are the correlations between the model parameters and the postinflationary evolution of the universe.…
Power Law Plateau Inflation Potential In The RS Braneworld Evading Swampland Conjecture
Rathin Adhikari, Mayukh Raj Gangopadhyay, Yogesh
In the recent time, inflationary cosmology is facing an existential crisis due to the proposed Swampland criterion which aims to evade any (meta-)stable de Sitter construction with…