He received his Doctor of Philosophy (Spin 3/2 Fields and Supergravity Theories) in 1977.
He is professor of physics at University of Rochester and Adjunct professor of Physics at Saha Institute of Nuclear Physics, Kolkata, India. He received his Bachelor of Science (honours) in 1972 and Mississippi in 1974 in physics from University of Delhi. He did his graduate studies in supersymmetry and supergravity at State University of New York at Stony Brook.
He was a research associate at the City College of New York, the University of Maryland and at Rutgers University before joining the University of Rochester in 1982.
He was promoted to professor in 1993 and is still there. He is also the adjunct professor of physics at Saha Institute of Nuclear Physics in India.
Das" research is in the area of theoretical high energy physics. He works on supersymmetry and supergravity.
In recent years, he has worked extensively on non-linear integrable systems, which are systems which in spite of their complicated appearance can be exactly solved.
He has also been working on finite temperature field theories, generalization of the Standard Model to incorporate Communist Party violation, and problems in quantum field theory and string theory. Although he has published widely with physicists around the world, his particularly strong collaboration with Latin American physicists is well known. In fact, he has coauthored over 100 published research papers with Brazilian physicists alone.
In 2006 he was awarded a Fulbright scholarship to teach physics in Brazil.
He has written numerous books and monographs on various disciplines of theoretical physics in advanced and undergraduate and graduate level, like A Path Integral Approach (World Scientific publishers), Finite Temperature Field Theory (World Scientific publishers), Integrable Models (World Scientific Lecture Notes in Physics), Lectures on Gravitation (World Scientific publishers), and Lectures on Electromagnetism: second edition (World Scientific publishers) et cetera In 2002 Das was made a fellow of the American Physical Society "Foreign contributions in the areas of supergravity, integrable models and finite temperature field theory".