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  • Fairoos, C.; Ghosh, Avirup; Sarkar, Sudipta (American Physical Society, 2018-07)
    We study the entropy evolution of black holes in Lovelock gravity by formulating a thermodynamic generalization of the null Raychaudhuri equation. We show that the similarity between the expressions of entropy change of ...
  • Fairoos, C.; Ghosh, Avirup; Sarkar, Sudipta (World Scientific, 2018-10)
    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 (American Physical Society, 2019-10)
    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 (American Physical Society, 2018-04)
    The change in holographic entanglement entropy (HEE) for small fluctuations about pure anti-de Sitter (AdS) is obtained by a perturbative expansion of the area functional in terms of the change in the bulk metric and the ...
  • Fairoos, C.; Ghosh, Avirup; Sarkar, Sudipta (American Physical Society, 2017-10)
    The formulation of the laws of Black hole mechanics assumes the stability of black holes under perturbations in accordance with the “cosmic censorship hypothesis” (CCH). CCH prohibits the formation of a naked singularity ...
  • Mishra, Akash; Chakraborty, Sumanta; Ghosh, Avirup; Sarkar, Sudipta (Springer, 2018-09)
    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. Here, we study the ...
  • Chatterjee, Ayan; Ghosh, Avirup (Springer, 2018-07)
    Quasilocal formulations of black hole are of immense importance since they reveal the essential and minimal assumptions required for a consistent description of black hole horizon, without relying on the asymptotic boundary ...

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