subbu [dot] sirsi [at] gmail [dot] com
Photo credits: D. Davies (MPP)
Hi, I am a theoretical physicist.
My wordline in theoretical physics so far has been,
PhD at Indian Institute of Science Education and Research Thiruvananthapuram. (Aug 2014- Dec 2019). Thesis advisor: Dr. Bindusar Sahoo).
Postdoctoral fellow at the Center for String Interactions, Harish-Chandra Research Institute from Dec 2019 - Sept 2022.
Postdoctoral fellow at the Theoretical physics division at The Institute of Mathematical Sciences, Chennai Sept 2022 - July 2024.
Post doctoral fellow in the Quantum Field Theory group at the Max Planck Institute for Physics, Munich as a part of the ERC UNIVERSE+ project on positive geometries. July 2024 - May 2026.
My area of research is theoretical high energy physics. I currently work on aspects of scattering amplitudes in quantum field theory, two dimensional conformal field theories and black holes in supergravity. My studies have focused mainly on symmetry properties of these theories, which may sometimes be hidden.
My recent focus has been on the relation between scattering amplitudes in massive theories, in particular the Coulomb branch of N=4 SYM, and positive geometries. Amplitudes in this theory can serve as prototypes for the study of on-shell methods for theories with massive particles. I am interested in investigating for an amplituhedron-like structure for the amplitudes in this theory.
Since my PhD days, I have contributed to some new developments in N extended conformal supergravity. Conformal supergravity theories provide a systematic method to construct Poincaré supergravity invariants which are useful to understand higher derivative corrections to black hole entropy. Currently, I am focused on black holes in Euclidean supergravity which have gained recent interest in the context of computing superconformal index correponding to blackholes using macroscopic saddles and comparing them with string theory results using microstate counting. This is one of the powerful consistency checks on string theory.
In the past, I have also worked on problems in the area of quantum information and in particular, on mixed state entanglement.
I delivered some lectures on supergravity in Student Talks on Trending Topics in Theory (ST4) 2020 held on Zoom. Video recording can be found on the ST4 channel on Youtube(for eg here). Here are the slides from my lectures.
In ST4 2023, I delivered four lectures introducing on-shell methods for scattering amplitudes. Lecture notes can be found here.
To access my publications please visit: arXiv, Google Scholar or INSPIRE HEP
Here is the link for my CV.