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About me

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Physics Ph.D. Student

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I am at present a graduate student at the Indian Institute of Science Education and
Research Thiruvananthapuram. I completed my Ph.D.  in December 2022 in
theoretical high energy physics under the supervision of Dr. Bindusar Sahoo. My thesis
work is focused on constructing Higher derivative actions in extended supergravity
in four dimensions, using superconformal calculus and the superform action principle. i did my first postdoc at Chennai Mathematical Institute (CMI), India from Dec 2022 - October 2023. Currently, I am a reserch fellow under YST (Young Scientist Training Program) at Asia Pacific Center for Theoretical Physics (APCTP), Pohang, South Korea. 


My present research interests include, in broad terms,

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  • Effects of Gauss-Bonnet term 

  • Quantum Entropy of black holes in supergravity theories.

  • Thermodynamics of AdS black holes in their near BPS limit.

  • Cosmology in supergravity theories

 

Techniques that I have learned during my Ph.D.

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  • Superconformal tensor calculus: To construct higher derivative actions in supergravity theories starting from superconformal theories.

  • Superform Action Principle: To construct a density formula for any supergravity theory.

  • Entropy Function Formalism to compute classical entropy.

  • Supersymmetric localization to compute quantum entropy.

  • Double copy construction

  • Working knowledge of Mathematica and Cadabra.

Apart from research, I have also been a Teaching Assistant for multiple physics courses,
where responsibilities included grading and conducting tutorials for the students.

  •  Mechanics

  • Thermodynamics and Statistical Physics

  • High Energy Physics

  • Mathematical Methods for Physics

  • Optics

Research Summary

The primary focus of my research has been understanding the thermodynamics of black holes in a deformed supergravity setup. Undeformed or basic supergravity theories are those in which the action is made up exclusively of kinetic terms and a few interactions that are entirely determined by supersymmetry (modulo the freedom that is related to the choice of possible matter couplings). The first type of deformed theory is the higher derivative supergravity. There are several reasons to study deformations of two derivative supergravity theories by allowing terms in action with more than two derivatives. Our motivation for constructing such actions in supergravity theories was to study the subleading corrections to black hole entropy. We constructed higher derivative actions in N = 2 and N = 3 supergravity in four dimensions using the superconformal method, which is a way of constructing an off-shell supergravity action.


The second type of deformed supergravity is gauged supergravity theories. In a gauged super-
gravity, in addition to the Poincaré symmetries and supersymmetry, one also gauges an internal
symmetry group. A gauged supergravity admits Anti-de Sitter (AdS) black hole solutions. AdS
spacetime acts like a box of finite volume, allowing AdS black holes to be in equilibrium with thermal radiation at a fixed temperature. AdS black holes have positive specific heat and can be thought of as the ideal laboratory for understanding black hole thermodynamics because of their stability. We develop the thermodynamics of BPS and near-BPS AdS6 black holes. We also study the phase diagram of BPS black holes.

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