Rajesh Kumar is an Assistant Professor of Physics at Sido Kanhu Murmu University, Dumka, Jharkhand. He has six years of teaching experience and previously served as Project Scientist-B at INCOIS, Hyderabad, under the Ministry of Earth Sciences, Government of India. He holds an M.Sc. in Physics from IIT Kanpur, with specialization in Computational Physics. His academic interests include Quantum Mechanics, Non-Hermitian Physics, Computational Physics, and Mathematical Methods in Physics.