2 papers
gr-qc2026
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…
gr-qc2025
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…