Browsing by Author "Fairoos, C."

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    Dynamic phase transition of black holes in massive gravity
    (Academic Press Inc., 2023) Safir, T.K.; Naveena Kumara, A.N.; Punacha, S.; Ahmed Rizwan, C.L.A.; Fairoos, C.; Vaid, D.
    The dynamical properties of small-large black hole phase transition in dRGT non-linear massive gravity theory are studied based on the underlying free energy landscape. The free energy landscape is constructed by specifying the Gibbs free energy to every state, and the free energy profile is used to study the different black hole phases. The small-large black hole states are characterized by probability distribution functions and the kinetics of phase transition are described by the Fokker–Planck equation. Further, a detailed study of the first passage process is presented which describes the dynamics of phase transitions. Finally, we have investigated the effect of mass and topology on the dynamical properties of phase transitions of black holes in dRGT non-linear massive gravity theory. © 2023 Elsevier Inc.
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    Physical process first law and the entropy change of Rindler horizons
    (Academic Press Inc., 2023) Safir, T.K.; Fairoos, C.; Vaid, D.
    The physical process version of the first law can be obtained for bifurcate Killing horizons with certain assumptions. Especially, one has to restrict to the situations where the horizon evolution is quasi-stationary, under perturbations. We revisit the analysis of this assumption considering the horizon perturbations of Rindler horizon by a spherically symmetric object. We demonstrate that even if the quasi-stationary assumption holds, the change in entropy, in four space–time dimensions, diverges when considered between asymptotic cross-sections. However, these divergences do not appear in higher dimensions. We also analyze these features in the presence of a positive cosmological constant. In the process, we prescribe a recipe to establish the physical process first law in such ill-behaved scenarios. © 2023 Elsevier Inc.