Activities, Media & Resources  

My last talk at NISER at the Physics Club VIKIRAN on Title: 'The Hunt for Imaginary Energies'

Abstract: Energy, a fundamental concept in physics, is traditionally understood as a real quantity. In Quantum Mechanics, since Dirac, we traditionally assume Hamiltonians are Hermitian. However, no quantum system truly exists in isolation. Interactions with its surroundings lead to the effective non-conservation of probability, driven by the exchange of energy, particles, and information with external degrees of freedom beyond our Hilbert space of interest. An effective framework for understanding these phenomena is provided by non-Hermitian quantum mechanics, which explains the emergence of imaginary energies in certain contexts. Even non-Hermitian systems can exhibit a real spectrum under certain conditions. In this talk, I will mainly focus on simple non-Hermitian topological systems, providing an overview, simulations, and a comparison with their Hermitian counterparts and talk about future challenges. 

Link: YT link