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  • Fairoos, C.; Ghosh, Avirup; Sarkar, Sudipta (Cornell University Library, 2018-02)
    We study the entropy evolution of black holes in Lovelock gravity by formulating a thermodynamic generalization of null Raychaudhuri equation. We show that the similarity between the expressions of entropy change of the ...
  • Fairoos, C.; Ghosh, Avirup; Sarkar, Sudipta (Cornell University Library, 2017-05)
    The evolution of the black hole horizon can be effectively captured by a fictitious membrane fluid living on the stretched horizon. We show that the dynamics of this boundary matter arises from the invariance of the bulk ...
  • Ghosh, Avirup; Jana, Soumya; Mishra, Akash K.; Sarkar, Sudipta (Cornell University Library, 2019-06)
    General relativity may be an effective theory with higher curvature correction terms in the action. Inclusion of these terms leads to exciting new possibilities, e.g., gravitational and electromagnetic perturbations following ...
  • Ghosh, Avirup; Mishra, Rohit (Cornell University Library, 2019-07)
  • Chakraborty, Sumanta; Ghosh, Avirup; Sarkar, Sudipta (Cornell University Library, 2017-09)
    Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon. In dynamical ...
  • Chakraborty, Sumanta; Ghosh, Avirup; Sarkar, Sudipta (Cornell University Library, 2017-09)
    Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon. In dynamical ...

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