Souradeep Das
About myself
I am a second-year PhD student at the Ohio State University. I work on theoretical astrophysics, cosmology and astroparticle physics. I joined the PhD program at OSU Department of Physics, starting August 2025.
I completed my undergraduate and master’s studies at the Indian Institute of Science (IISc) in Bengaluru, India. I graduated with BS and MS degrees in 2025, with a major in Physics. My primary interest is in astrophysics, especially astroparticle physics and cosmology. I have taken undergraduate and graduate-level courses in astrophysics, cosmology, and high-energy physics. Besides, I have been involved in astroparticle physics and cosmology research for the last three years.
What I work on
My first involvement in scientific research came with a project on transitions in dimers with Prof. Vivek Tiwari at SSCU, IISc starting the summer of 2021. During this time, I learned quantum mechanics from a chemical physics viewpoint. Following this, I had a brief reading project on general theory of relativity during the summer of 2022 under the guidance of Prof. Rajeev Kumar Jain. After completing core-coursework in early 2023, I spent the summer fo 2023 in Canberra, Australia as a Future Research Talent scholar with the Australian National University (ANU). During this stint I worked with Prof. Mark Krumholz and Prof. Roland Crocker at the Research School of Astronomy and Astrophysics at ANU’s Mount Stromlo Observatory. This was my first research project on astrophysics and introduced me to a variety of scientific and computational methods. My work involved simulating the evolution and annihilation of positrons in the galactic interstellar medium and constraining properties of the injection of these positrons through their gamma-ray signature. I continued working on this project for the rest of my undergrad, ultimately leading to a paper.
Starting the autumn of 2023, I began working with Prof. Jain on cosmological origin of primordial non-Gaussianities through a spectator scalar field during the epoch of cosmic inflation. This research project formed my bachelor’s thesis at IISc in early 2024. Besides, I started working with Prof. B. Ananthanarayan, along with fellow IISc undergrad Sarthak Talukdar, on a review article on the applications of group theory in physics through the Mathematica software. This led to a publication in European Physics Journal Special Topics in 2024. In the summer of 2024, I started attending Prof. Ranjan Laha’s group at IISc, and briefly worked on Hawking radiation from primordial black holes. Starting August 2024, I joined the masters program at IISc. I started working with Prof. Laha and two of his graduate students, now Dr. Ranjini Mondol, and Abhijeet Singh, on a project that aimed to use observations of the earliest galaxies by the James Webb Space Telescope (JWST) to constrain the interactions between dark matter and ordinary matter such as protons or electrons. This project formed part of my master’s thesis at IISc and ultimately went on to be published in Physical Review Letters in 2026.
More information about these projects are available on the Projects page
Education
- Ohio State University, Columbus OH - Doctor of Philosophy: 2025 - present
- Indian Institute of Science, Bengaluru - Master of Science in Physics: 2024-2025
- Indian Institute of Science, Bengaluru - Bachelor of Science (Research) in Physics: 2020-2024
Academic Interests
- Cosmology
- Astro-particle physics
- High-Energy Astrophysics
Publications and preprints
See my research profile on INSPIRE / Google Scholar
Contact
I am currently in Columbus, Ohio, US. You can contact me via email: soura2302@gmail.com