26 citations · 65 across the 20 of their papers we have counts for
20 papers
Universality of Quasinormal-Mode Shifts from Small Nonlocal Effective Couplings
Anisur Rahaman
We investigate perturbative quasinormal-mode (QNM) shifts of black holes arising from fractional, nonlocal modifications to the wave operator. Starting from a scalar master equatio…
An atom in front of Lorentz violating Kalb-Ramond black hole background
Anisur Rahaman
We investigate the role of Lorentz violation in the acceleration radiation produced when an atom falls into a Kalb-Ramond (KR) black hole and observe that the amplitude and an expo…
Non-Minimal RT Coupling and its Impact on Inflationary Evolution in f(R, T) Gravity
Sohan Kumar Jha, Anisur Rahaman
We examine inflationary models in the gravity framework where we have a conformal constant and an -mixing term apart from an R term. The RT-mixing term introduces non…
Radiative transition of an atom falling into spherically symmetric Lorentz violating black hole background
Anisur Rahaman
In this work, we explore the intriguing phenomenon of acceleration radiation exhibited by an atom falling into a black hole, as previously studied in Phys. Rev. Lett. 121, 071301 (…
Constrain from shadows of and and quasiperiodic oscillations of galactic microquasars on a black hole arising from metric-affine bumblebee model
Sohan Kumar Jha, Anisur Rahaman
We examine a static spherically symmetric black hole metric that originates from the vacuum solution of the traceless metric-affine bumblebee model in which spontaneous Lorentz sym…
GUP corrected black holes with cloud of string
Ahmad Al-Badawi, Sanjar Shaymatov, Sohan Kumar Jha +1
We investigate shadows, deflection angle, quasinormal modes (QNMs), and sparsity of Hawking radiation of the Schwarzschild string cloud black hole's solution after applying quantum…
Hairy black hole, Fermionic greybody factors, Quasinormal modes, Hawking radiation, Power spectrum and sparsity
Ahmad Al-Badawi, Sohan Kumar Jha, Anisur Rahaman
A hairy black hole (HBH) emerges due to matter surrounding the Schwarzschild metric when using the Extended Gravitational Decoupling (GD) approach. The fermionic greybody factors (…
Accretion, greybody factor, quasinormal modes, power spectrum, sparsity of Hawking radiation, and weak gravitational lensing of a minimum measurable length inspired Schwarzchild black hole
Himangshu Barman, Ahmad Al-Badawi, Sohan Kumar Jha +1
In this manuscript, we delve into an analytic and numerical probe of shadow with different accretion models, quasinormal modes, Hawking radiation, and gravitational lensing to stud…
Study of quasinormal modes, greybody bounds, and sparsity of Hawking radiation within the metric-affine bumblebee gravity framework
Sohan Kumar Jha, Anisur Rahaman
We consider a static and spherically symmetric black hole metric that emerges from the vacuum solution of the traceless metric-affine bumblebee model. Our study focuses on the poss…
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…
The inflationary scenario in the gravity model with a term
Sahazada Aziz, Sohan Kumar Jha, Anisur Rahaman
We investigate the cosmic inflation scenario of a specific model that contains more than one higher-order term in . The considered here has the terms , ,…
Superradiance scattering off rotating Simpson-Visser black hole and its shadow in the non-commutative setting
Sohan Kumar Jha, Anisur Rahaman
We consider non-commutating Simpson-Visser spacetime and study the superradiance phenomena and the shadow cast by the back hole associated with this modified spacetime. We extensiv…
Gravitational lensing by the hairy Schwarzschild black hole
Sohan Kumar Jha, Anisur Rahaman
In this manuscript, we consider the hairy Schwarzschild black hole that evades the no-hair theorem. The hair is induced by an additional source from surroundings, such as dark matt…
Thermodynamics of a Schwarzschild-like black hole with a minimum observable length and the radiation process of a thin accretion disc around it
Himangshu Barman, Mohamed Moussa, Homa Shababi +1
We study quantum gravity effects on the thermodynamic character and the radiation process of the thin accretion disks around Schwarzschild-like black hole. The quantum gravity corr…
Kerr-Sen-like Lorentz violating black holes and Superradiance phenomena
Sohan Kumar Jha, Anisur Rahaman
A Kerr-Sen-like black hole solution results from Einstein-bumblebee gravity. It contains a Lorentz violating (LV) parameter that enters when the bumblebee field receives vacuum exp…
Impact of generalized uncertainty principle on the accretion process within the asymptotically safe ambiance
Anisur Rahaman
We investigate the impact of quantum gravity on accretion onto a modified Schwarzschild black hole within the context of the generalized uncertainty principle (GUP). The minimal me…
Lorentz violation and noncommutative effect on superradiance scattering off Kerr-like black hole and on the shadow of it
Sohan Kumar Jha, Anisur Rahaman
We consider a Lorentz violating non-commutating Kerr-like spacetime and studied the superradiance effect and the shadow cast by the back hole. We extensively study the different as…
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…
Comment on the paper Generalized version of chiral Schwinger model in terms of chiral bosonization, Eur.Phys.J.C 81 (2021) 3, 199
Anisur Rahaman
The results and calculations of the article \cite{SY} is found erroneous for a generic and it remains irremediable in general. However for , , and it may…
A precisely feasible gauged model of chiral boson with its BRST cohomological perspectives
Anisur Rahaman
We find that Siegel type chiral boson with a parameter-dependent Lorentz non-covariant masslike term for the gauge fields to be equivalent to the chiral Schwinger model with one pa…