5 papers
Effective General Relativistic Description of Jamming in Granular Matter
Soumendra Kishore Roy, Pratyusava Baral, Ratna Koley +1
We propose here that certain observational features of granular matter in the infrared limit, exhibiting the phenomenon of {\it jamming}, arise from an underlying effective general…
Probing the post-Minkowskian approximation using recursive addition of self-interactions
Soumendra Kishore Roy, Ratna Koley, Parthasarathi Majumdar
We address the problem of deriving the post-Minkowskian approximation, widely used in current gravitational wave literature by investigating a possible deduction out of the recursi…
Kinematics of Two-particle Scattering in Black Hole Backgrounds
Soumendra Kishore Roy, Ratna Koley, Parthasarathi Majumdar
We show that particle scattering in general curved backgrounds entails {\it six} independent, kinematical Mandelstam-like invariants, instead of the two in flat spacetime. Spacetim…
Gravitational Waves with Orbital Angular Momentum
Pratyusava Baral, Anarya Ray, Ratna Koley +1
Compact orbiting binaries like the black hole binary system observed in GW150914 carry large amount of orbital angular momentum. The post-ringdown compact object formed after merge…
Bacteria Around an Acoustic Black Hole: Trapping and Frame-Dragging
Amitava Banerjee, Ratna Koley, Parthasarathi Majumdar
Motivated by the need to conceive freely-precessing gyroscopes for detecting acoustic frame-dragging predicted recently in rotating acoustic analogue black holes, we report an inci…