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  • Exploring the gravitational stability / instability for a class of spacetime geometries 
    AGNIHOTRI, ASHUTOSH (2012-05)
    In this thesis we review some of the ideas that come up while investigating the classical stability of spacetime geometries. We restrict to the case in which there is no matter. We derive all the necessary material from ...
  • Stability Analysis of spherically symmetric space-time sourced by Anisotropic Fluids 
    KHAMESRA, BHAVESH (2014-05)
    In this work, we analyze the stability of spherically symmetric spacetimes sourced by perfect and anisotropic uids under a class of gravitational per- turbations. This has been done in a gauge-invariant formalism developed ...
  • An investigation of Stability of Anti-de Sitter Spacetime 
    KUMAR, PRANAV (2015-05)
    In this project, we analyze the structure of non spherically-symmetric Tensor Gravitational perturbations in the Transverse Traceless(TT) gauge beyond the linearized order on Anti-de Sitter(AdS) background in a ...
  • Aspects of linearized perturbations of black holes and flat black strings 
    SADHU, AMRUTA (Dept. of Physics, 2019-11)
    This thesis presents a study in aspects of linearized perturbations of flat black strings and black holes in D dimensions. Main focus of the thesis is on analysis the non-spherically symmetric perturbations of these ...
  • The effective field theory approach to gravitation 
    PATIL, RAJ (2020-04)
    In the light of the recent gravitational wave detections made by the LIGO and Virgo collaboration, we study the Non-Relativistic formulation of General Relativity (NRGR) with its extension to spinning compact objects. Then ...
  • AdS Instability and Nonlinear Perturbations in Confined Geometries 
    MENON, DHANYA S. (Dept. of Physics, 2021-08)
    In 2011, Bizon and Rostworowski, through their seminal work, gave numerical evidence that Anti-de Sitter spacetime with reflecting boundary conditions is nonlinearly unstable against black hole formation for a wide range ...
  • Near extremal black hole entropy 
    P B, HARITA (2023-05)
    Classically, the thermodynamics of near extremal black holes fails below a certain temperature. To avoid this problem, the existence of a “thermodynamic mass gap” between the extremal state and the lightest near extremal ...

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