output
20152022
most citedEarly and late universe holographic cosmology from a new generalized entropy

196 citations

18 papers

gr-qc2022★ 17 cited

Superradiant energy extraction from rotating hairy Horndeski black holes

Sohan Kumar Jha, Mohsen Khodadi, Anisur Rahaman +1

Adopting the manifest of low-frequency and low mass for the scalar perturbation, we perform a semi-classical analysis of the superradiance phenomenon for a rotating hairy Horndeski…

gr-qc2022★ 58 cited

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…

gr-qc2022★ 196 cited

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…

gr-qc2022★ 17 cited

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…

gr-qc2021★ 7 cited

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…

astro-ph.CO2021★ 81 cited

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…

gr-qc2021★ 14 cited

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…

gr-qc2021★ 26 cited

Study of Einstein-bumblebee gravity with Kerr-Sen-like solution in the presence of a dispersive medium

Sohan Kumar Jha, Sahazada Aziz, Anisur Rahaman

A Kerr-Sen-like black hole solution appears in the Einstein-bumblebee theory of gravity. The solution contains contains a Lorentz violating parameter in an explicit manner. We stud…

hep-th2021★ 24 cited

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…

hep-th2020★ 26 cited

Bumblebee gravity and particle motion in Snyder noncommutative spacetime structures

Sohan Kumar Jha, Himangshu Barman, Anisur Rahaman

A metric with a Lorentz violating parameter is associated with the bumblebee gravity model. We study the motion of a particle in this bumblebee background where the dynamical varia…

quant-ph2020★ 2 cited

Von Neumann entropy in a dispersive cavity

Ram Narayan Deb

We study the von Neumann entropy of the partial trace of a system of two two-level atoms (qubits) in a dispersive cavity where the atoms are interacting collectively with a single…

gr-qc2020★ 77 cited

Bumblebee gravity with a Kerr-Sen-like solution and its Shadow

Sohan Kumar Jha, Anisur Rahaman

Lorentz-Violating (LV) scenario gets involved through a bumblebee field vector field . A spontaneous symmetry breaking allows the field to acquires a vacuum expectation value…

gr-qc2020★ 54 cited

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…

physics.gen-ph2020★ 9 cited

On the reformulation of Thomas-Fermi model to make it compatible to the Planck-scale

Himangshu Barman, Anisur Rahaman, Sohan Kumar Jha

Thomas-Fermi model is considered here to make it cogent to capture the Planck-scale effect with the use of a generalization of uncertainty relation. Here generalization contains bo…

quant-ph2020

Measure of tripartite quantum correlation in multiqubit symmetric pure state

Ram Narayan Deb

We propose a direct measure of tripartite quantum correlation in an arbitrary symmetric pure state of N correlated two-level atoms (qubits). We compute the third order moments of t…

gr-qc2020★ 78 cited

Extended matter bounce scenario in ghost free gravity compatible with GW170817

E. Elizalde, S. D. Odintsov, V. K. Oikonomou +1

In the context of a ghost free model, an extended matter bounce scenario is studied where the form of the scale factor is given by . The g…

quant-ph2016★ 1 cited

A total measure of multi-particle quantum correlations in atomic Schrödinger cat states

Ram Narayan Deb

We propose a total measure of multi-particle quantum correlation in a system of N two-level atoms (N qubits). We construct a parameter that encompasses all possible quantum correla…

quant-ph2015★ 2 cited

Quantification of Quantum Entanglement in a Multiparticle System of Two-Level Atoms Interacting with a Squeezed Vacuum State of the Radiation Field

Ram Narayan Deb

We quantify multiparticle quantum entanglement in a system of N two-level atoms interacting with a squeezed vacuum state of the electromagnetic field. We calculate the amount of qu…