Purvaash P U

Research experience

Current PhD research

Entanglement, symmetries, and quantum thermalisation

I am currently working with Prof. Pasquale Calabrese at SISSA on entanglement and symmetries in quantum many-body systems. My recent work investigates quantum thermalisation in isolated free-fermionic systems, with an emphasis on the interplay between conserved quantities, subsystem dynamics, and entanglement..



Past research experience

At Weizmann Instiute of Science (WIS)

I worked on particle physics phenomenology under the supervision of Prof. Yosef Nir. In this project, I studied Higgs boson decays in the context of BSM physics. I used data from LHC to constrain BSM model parameters. More about this project can be found in this article, which is my first publication.


At IIT Bombay (IITB)

During my stay at IITB, I studied near-field radiative heat transfer (NFRHT) under the supervision of Prof. Karthik Sasihithlu. I explored how, in NFRHT, evanescent waves contribute to radiative heat transfer, resulting in super-Planckian behaviour. It is called super-Planckian as the heat transferred between the two objects exceeds the black body limit. As the distance between the objects decreases, the amount of heat transferred can be \(10^5\) times the black body limit.

Comparing near-field with far-field heat transfer and black body limit

I also studied how the near-field behaviour depends on the optical properties of the material. Later, I studied and reproduced results of Prof. Karthik Sasihithlu’s paper, Coupled harmonic oscillator model to describe surface-mode mediated heat transfer. In the final stages of the project, I tried simulating NFRHT using molecular dynamics under the supervision of Prof. Karthik Sasihithlu and Prof. M. P. Gururajan.