58 citations · 253 across the 39 of their papers we have counts for
40 papers
Gravitational Wave Propagation in K-essence Cosmology: Theory and Observational Constraints
Sougata Bhunia, Eduardo Guendelman, Debashis Gangopadhyay +3
Gravitational waves (GWs) provide a powerful, theory-independent probe of the dynamical structure of spacetime and the cosmological background. We study linearized GW propagation i…
Boltzmann Dynamics in K-essence Cosmology: Photon Propagation in an Emergent Spacetime
Krishnendu Roy, Debashis Gangopadhyay, Chiranjeeb Singha +1
Recent cosmological tensions, notably the Hubble and tensions, motivate extensions of the conventional FLRW framework in which additional dynamical fields can alter the eff…
Observational Insights on DBI K-essence Models Using Machine Learning and Bayesian Analysis
Samit Ganguly, Arijit Panda, Eduardo Guendelman +3
We perform a late-time cosmological study; we compare the performance of two Dirac-Born-Infeld (DBI)-type k-essence scalar field extensions of the CDM model to the standard fram…
From Geometry to Observation: Gravitational Waves and the Raychaudhuri Equation
Sougata Bhunia, Anubhab Dutta, Debashis Gangopadhyay +1
Gravitational waves (GWs) are independent of any particular theory of gravity. The universality of this notion is highlighted by the Raychaudhuri equation (RE), which is independen…
Non-Affine Extensions of the Raychaudhuri Equation in the K-essence Framework
Samit Ganguly, Goutam Manna, Debashis Gangopadhyay +2
We present a new avenue of the Raychaudhuri Equation (RE) by introducing a non-affine parametrization within the k-essence framework. This modification accounts for non-geodesic fl…
Form Invariance of Raychaudhuri equation in the presence of Inflaton-type fields
Arijit Panda, Debashis Gangopadhyay, Goutam Manna
We show that the Raychaudhuri equation remains form invariant for certain solutions of scalar fields whose Lagrangian is non-canonical and of the form $\mathcal{L}(X,ϕ)=-V(ϕ)F(…