23 citations · 46 across the 11 of their papers we have counts for
11 papers
Magnetically assisted primordial scalar perturbations: Scalar-Induced Gravitational Waves
Arko Bhaumik, Theodoros Papanikolaou, Anish Ghoshal
Primordial magnetic fields (PMFs) provide a well-motivated source of cosmological perturbations through their anisotropic stress and may leave observable imprints in both the scala…
Primordial magnetic fields in the light of upcoming post-EoR Lyman- and 21-cm observations
Arko Bhaumik, Sourav Pal, Supratik Pal
The Lorentz force exerted by a primordial magnetic field (PMF) on the coupled baryon-dark matter system may enhance total matter power at small scales after recombination. In the p…
Can spacetime torsion source an extremely red-tilted cosmological GW background?
Arko Bhaumik, Bhaswati Mandal, Soumitra SenGupta
In the presence of spacetime torsion, any generic model of gravity is conformally dual to a scalar-tensor theory augmented with a second rank antisymmetric massless degree o…
Vector induced Gravitational Waves sourced by Primordial Magnetic Fields
Arko Bhaumik, Theodoros Papanikolaou, Anish Ghoshal
In this work, we develop a generic formalism for the study of tensor perturbations induced at second order by first-order vector metric perturbations, dubbing these induced tensor…
Revisiting primordial magnetic fields through 21-cm physics: Bounds and forecasts
Arko Bhaumik, Debarun Paul, Supratik Pal
Primordial magnetic fields (PMFs) may significantly influence 21-cm physics via two mechanisms: (i) magnetic heating of the intergalactic medium (IGM) through ambipolar diffusion (…
Moduli Dynamics in Effective Nested Warped Geometry in Four Dimensions and Some Cosmological Implications
Arko Bhaumik, Soumitra SenGupta
We analyze the effective four-dimensional dynamics of the extra-dimensional moduli fields in curved braneworlds having nested warping, with particular emphasis on the doubly warped…
Primordial magnetic non-Gaussianity with generic vacua and detection prospects in CMB spectral distortions
Arko Bhaumik, Supratik Pal
Assuming a slow-roll inflationary model where conformal invariance of the Maxwell action is broken via a non-minimal kinetic coupling term, we investigate the non-Gaussian three-po…
Reconstructing the Hubble parameter with future Gravitational Wave missions using Machine Learning
Purba Mukherjee, Rahul Shah, Arko Bhaumik +1
We study the prospects of Gaussian processes (GP), a machine learning (ML) algorithm, as a tool to reconstruct the Hubble parameter with two upcoming gravitational wave miss…
Nested warped geometry in a non-flat braneworld scenario
Arko Bhaumik, Soumitra SenGupta
We generalize nested multiply warped braneworld models by incorporating non-zero brane curvature caused by an effective cosmological constant Ω induced on the 3-branes. Starting wi…
A thorough investigation of the prospects of eLISA in addressing the Hubble tension: Fisher Forecast, MCMC and Machine Learning
Rahul Shah, Arko Bhaumik, Purba Mukherjee +1
We carry out an in-depth analysis of the capability of the upcoming space-based gravitational wave mission eLISA in addressing the Hubble tension, with a primary focus on observati…
Moduli stabilization with bulk scalar in nested doubly warped braneworld model
Arko Bhaumik, Soumitra SenGupta
We examine the modulus stabilization mechanism of a warped geometry model with nested warping. Such a model with multiple moduli is known to offer a possible resolution of the ferm…