Research and Publications
My research focuses on strong-field probes of general relativity, black holes, and gravitational-wave physics. I use theoretical and computational methods, particularly black hole perturbation theory and numerical relativity, to study gravitational collapse, quasinormal modes, ringdown physics and late-time dynamics. More broadly, I am interested in understanding how gravity behaves in extreme regions of spacetime and how gravitational waves, black hole shadows, gravitational lensing, and geodesic motion can be used to test gravity in the strong-field regime.
I have also been fortunate to collaborate with many researchers in these areas. The collaborations page contains photographs of some of my mentors, collaborators, co-authors, and cherished colleagues.
Preprints
When the Ringing Stops: Purely Imaginary Modes in the Ringdown Spectrum of Dynamical Black Holes
Lodovico Capuano, Thomas Lovo, Gorka Prieto-Varela, Subhodeep Sarkar, Adrien Kuntz, Enrico Barausse, Dawood Kothawala
arXiv:2605.28951 [gr-qc]
The Physics of Black Holes and Their Environments: Consequences for Gravitational Wave Science
Vitor Cardoso, Shauvik Biswas, Subhodeep Sarkar
arXiv:2511.14841 [gr-qc]
Published Papers
Gravitational atoms in the braneworld scenario
Sunil Singh Bohra, Subhodeep Sarkar, and Anjan Ananda Sen
Phys. Rev. D 2024.
Perturbing the perturbed: Stability of quasinormal modes in presence of a positive cosmological constant
Subhodeep Sarkar, Mostafizur Rahman, and Sumanta Chakraborty
Phys. Rev. D 2023.
Can we detect a supertranslated black hole?
Subhodeep Sarkar, Shailesh Kumar, and Srijit Bhattacharjee
Phys. Rev. D 2022.
Scalar perturbations of black holes in Jackiw-Teitelboim gravity
Srijit Bhattacharjee, Subhodeep Sarkar, and Arpan Bhattacharyya
Phys. Rev. D 2021.
Mass inflation and strong cosmic censorship in a nonextreme BTZ black hole
Srijit Bhattacharjee, Shailesh Kumar, and Subhodeep Sarkar
Phys. Rev. D 2020.
Please visit my INSPIRE-HEP profile for bibliometrics and a possibly updated list of papers.
