196 citations · 1.5k across the 55 of their papers we have counts for
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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…
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…
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…
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…
Inflationary magnetogenesis with reheating phase from higher curvature coupling
Kazuharu Bamba, E. Elizalde, S. D. Odintsov +1
We investigate the generation of magnetic fields from inflation, which occurs via breakdown of the conformal invariance of the electromagnetic (EM) field, when coupled with the Ric…
Bouncing cosmology in a curved braneworld
Indrani Banerjee, Tanmoy Paul, Soumitra SenGupta
We explore the possibility of a non-singular bounce in our universe from a warped braneworld scenario with dynamical branes and a non-zero brane cosmological constant. Such models…
From a Bounce to the Dark Energy Era with Gravity
S. D. Odintsov, V. K. Oikonomou, Tanmoy Paul
In this work we consider a cosmological scenario in which the Universe contracts initially having a bouncing-like behavior, and accordingly after it bounces off, it decelerates fol…
Antisymmetric tensor fields in modified gravity: a summary
Tanmoy Paul
We provide various aspects of second rank antisymmetric Kalb-Ramond (KR) field in modified theories of gravity. The KR field energy density is found to decrease with the expansion…
Bottom-up reconstruction of non-singular bounce in F(R) gravity from observational indices
S. D. Odintsov, V. K. Oikonomou, Tanmoy Paul
We apply the bottom-up reconstruction technique in the context of bouncing cosmology in F(R) gravity, where the starting point is a suitable ansatz of observable quantity (like spe…