355 citations · 1.7k across the 51 of their papers we have counts for
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Causality constraints in Quadratic Gravity
Jose D. Edelstein, Rajes Ghosh, Alok Laddha +1
Classifying consistent effective field theories for the gravitational interaction has recently been the subject of intense research. Demanding the absence of causality violation in…
Black Hole Thermodynamics: General Relativity and Beyond
Sudipta Sarkar
Black holes have often provided profound insights into the nature of gravity and the structure of space-time. The study of the mathematical properties of black objects is a major r…
Internal Structure of Charged AdS Black Holes
Srijit Bhattacharjee, Sudipta Sarkar, Amitabh Virmani
When an electrically charged black hole is perturbed its inner horizon becomes a singularity, often referred to as the Poisson-Israel mass inflation singularity. Ori constructed a…
Entropy functionals and c-theorems from the second law
Srijit Bhattacharjee, Arpan Bhattacharyya, Sudipta Sarkar +1
We show that for a general four derivative theory of gravity, only the holographic entanglement entropy functionals obey the second law at linearized order in perturbations. We als…
The Black Hole Membrane Paradigm in f(R) Gravity
Saugata Chatterjee, Maulik Parikh, Sudipta Sarkar
To an outside observer, a black hole's event horizon appears to behave exactly like a dynamical fluid membrane. We extend this membrane paradigm to black holes in general th…
Beyond the Einstein Equation of State: Wald Entropy and Thermodynamical Gravity
Maulik K. Parikh, Sudipta Sarkar
We show that the classical equations of gravity follow from a thermodynamic relation, dQ = T dS, where S is taken to be the Wald entropy, applied to a local Rindler horizon at any…