196 citations · 1.5k across the 55 of their papers we have counts for
56 papers
Tensor Perturbations from Bounce Inflation Scenario in f(Q) Gravity
Kun Hu, Tanmoy Paul, Taotao Qiu
In this paper, we construct a bounce inflation cosmological scenario in the framework of the modified symmetric teleparallel gravity, namely f(Q) theory, and investigate the tensor…
Horizon entropy consistent with FLRW equations for general modified theories of gravity and for all EoS of the matter field
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul +1
The question that continues to hinge the interrelation between cosmology and thermodynamics is broadly described as -- what is the form of horizon entropy that links the Friedmann…
Holographic realization from inflation to reheating in generalized entropic cosmology
Sergei D. Odintsov, Simone D'Onofrio, Tanmoy Paul
The growing cosmological interest of different entropy functions (like the Tsallis entropy, the Rényi entropy, the Barrow entropy, the Sharma-Mittal entropy, the Kaniadakis entropy…
From inflation to reheating and their dynamical stability analysis in Gauss-Bonnet gravity
Sergei D. Odintsov, Tanmoy Paul
We investigate the inflation and reheating phenomenology in scalar-Einstein-Gauss-Bonnet theory of gravity where a scalar field non-minimally couples with the Gauss-Bonnet (GB) cur…
Holographic realization of constant roll inflation and dark energy: An unified scenario
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul
Based on generalized holographic formalism, we establish a holographic realization of constant roll inflation during the early universe, where the corresponding cut-off depends on…
Generalised (non-singular) entropy functions with applications to cosmology and black holes
Sergei D. Odintsov, Tanmoy Paul
The growing interest of different entropy functions proposed so far (like the Bekenstein-Hawking, Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropi…
A non-singular generalized entropy and its implications on bounce cosmology
Sergei D. Odintsov, Tanmoy Paul
We propose a new five-parameter entropy function that proves to be singular-free during the entire cosmic evolution of the universe, and at the same time, also generalizes the Tsal…
Modified cosmology from the thermodynamics of apparent horizon
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul
In the realm of the Bekenstein-Hawking entropy, the thermodynamics of apparent horizon bridges with the usual FLRW (Friedmann-Lemaître-Robertson-Walker) equation only for a special…
On property- and relative Chebyshev centers in Banach spaces-II
Syamantak Das, Tanmoy Paul
We continue to study (strong) property- in Banach spaces. As discussed by Pai \& Nowroji in [{\it On restricted centers of sets}, J. Approx. Theory, {\bf 66}(2), 170--189 (1…
Viable requirements of curvature coupling helical magnetogenesis scenario
Tanmoy Paul
In the present work, we examine the following points in the context of the recently proposed curvature coupling helical magnetogenesis scenario \cite{Bamba:2021wyx} -- (1) whether…
Bounce universe with finite-time singularity
Sergei D. Odintsov, Tanmoy Paul
This work explains how the presence of a Type-IV singularity (a mild singularity) can influence the dynamics of a bouncing universe. In particular, we examine bounce cosmology that…
Early and late universe holographic cosmology from a new generalized entropy
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul
We propose a new four-parameter entropy function that generalizes the Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropies for suitable limits of th…
Aspects of non-singular bounce in modified gravity theories
Indrani Banerjee, Tanmoy Paul, Soumitra SenGupta
Scenario of a bouncing universe is one of the most active area of research to arrive at singularity free cosmological models. Different proposals have been suggested to avoid the s…
Towards a smooth unification from an ekpyrotic bounce to the dark energy era
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul
In the context of a ghost free model, we present a non-singular cosmological scenario in which the universe initially contracts through an ekpyrotic phase having…
Uniqueness of Hahn--Banach extensions and some of its variants
Soumitra Daptari, Tanmoy Paul
In this study, we analyze the various strengthening and weakening of the uniqueness of the Hahn--Banach extension. In addition, we consider the case in which is an ideal of …
Ekpyrotic bounce driven by Kalb-Ramond field
Tanmoy Paul, Soumitra SenGupta
We propose an ekpyrotic bounce scenario driven by a second rank antisymmetric Kalb-Ramond field, where the universe initially contracts through an ekpyrotic stage having a non-sing…
Barrow entropic dark energy: A member of generalized holographic dark energy family
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul
The holographic cut-off, in the formalism of generalized holographic dark energy (HDE), is generalized to depend on $L_\mathrm{IR} = L_\mathrm{IR} \left( L_\mathrm{p}, \dot L_\math…
Unifying an asymmetric bounce to the dark energy in Chern-Simons F(R) gravity
Sergei D. Odintsov, Tanmoy Paul, Indrani Banerjee +2
We propose a cosmological scenario in which the universe undergoes through a non-singular bounce, and after the bounce, it decelerates having a matter-like dominated evolution duri…
A critical analysis of modulus stabilization in a higher dimensional F(R) gravity
Indrani Banerjee, Tanmoy Paul, Soumitra SenGupta
An exact solution for the bulk 5-dimensional geometry is derived for F(R) gravity with non-flat de-Sitter 3-branes located at the orbifold boundaries. The correspo…
Helical magnetogenesis with reheating phase from higher curvature coupling and baryogenesis
Kazuharu Bamba, Sergei D. Odintsov, Tanmoy Paul +1
We investigate the generation of helical magnetic fields and address the baryon asymmetry of the universe from an inflationary magnetogenesis scenario, in which the conformal and p…
Different faces of generalized holographic dark energy
Shin'ichi Nojiri, S. D. Odintsov, Tanmoy Paul
In the formalism of generalized holographic dark energy (HDE), the holographic cut-off is generalized to depend upon $L_\mathrm{IR} = L_\mathrm{IR} \left( L_\mathrm{p}, \dot L_\mat…
Decoding the phases of early and late time reheating through imprints on primordial gravitational waves
Md Riajul Haque, Debaprasad Maity, Tanmoy Paul +1
Primordial gravitational waves (GWs) carry the imprints of the dynamics of the universe during its earliest stages. With a variety of GW detectors being proposed to operate over a…
The effect of thermal radiation on singularities in the dark universe
I. Brevik, A. V. Timoshkin, Tanmoy Paul
Cosmological models with an inhomogeneous viscous dark fluid, coupled with dark matter in the Friedmann- Robertson-Walker (FRW) flat universe, are considered. The influence of ther…
Effective Theory of Inflationary Magnetogenesis and Constraints on Reheating
Debaprasad Maity, Sourav Pal, Tanmoy Paul
Effective theory framework based on symmetry has recently gained widespread interest in the field of cosmology. In this paper, we apply the same idea on the genesis of the primordi…