My current research interests include various modified theories of gravity which address some of the unsolved problems that arise in General Relativity. I also work in selected areas related to gravitational wave physics.
I have interest in some specific topics in String Theory and High Energy Physics which are linked to gravitational physics. Earlier, I have worked on string-inspired gravity, braneworld models, aspects related to the
Raychaudhuri equations, geometric flows and selected topics in quantum mechanics. Over the years, I have also attempted contributing to physics pedagogy through articles on classical and quantum physics, optics, geometry
and gravity.

All Publications

Displacement memory in regular black hole spacetimes by Acharyya R., Kar S. European Physical Journal Plus 141 1-22 (2026)
Shadows of dyonic Kerr-Sen black holes by Jana S., Kar S. Physical Review D15 108 0440081-04400814 (2023)
Quasinormal spectra of a family of wormholes: overtone featureas and a parameter controlled redshif by Maji A. B., Kar S. European Physical Journal C 86 1-26 (2026)
Diverse regular spacetimes from a parametrised density profile, by Kar A., Kar S. European Physical Journal C 85 1-20 (2025)
New rotating Lorentzian wormhole spacetime by Kar A., Jana S., Kar S. Physical Review D 111 - (2025)
Closed strings in a class of pp-wave spacetimes and the memory effect by Dey A., Kar S. Physical Review D 110 - (2024)
Modelling Einstein cluster using Einasto profile by Acharyya R., Banerjee P. , Kar S. Journal of Cosmology and Astroparticle Physics 04(070) 0701-07020 (2024)
Novel regular black holes: geometry, matter and shadow by Kar A., Kar S. General Relativity and Gravitation 56 521-5227 (2024)
Shadows of a generic class of spherically symmetric, static spacetimes by Mafuz M. G., Diwan R. , Jana S. , Kar S. European Physical Journal Plus 139 2191-21918 (2024)
Analog Raychaudhuri equation in mechanics by Bhatt R. P., Roy A. , Kar S. Resonance Journal of Science Education 28 389-410 (2023)