Sumit Ranjan Das (born December 11, 1955) is a US-based Indian high energy physicist and a Professor at the University of Kentucky College of Arts and Sciences. Known for his research on string theory, Das is an elected fellow of the Indian Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, for his contributions to physical sciences in 1998.[note 1]
Born on December 11, 1955 at Kolkata in the Indian state of West Bengal, Sumit Ranjan Das did his early schooling at South Point School and earned his graduate and master's degrees from the University of Calcutta. Moving to the US, he enrolled at the University of Chicago for his doctoral studies and after securing a PhD in 1983, he did his post-doctoral studies at Fermilab (1983–85) and California Institute of Technology (1985–87). On his return to India in 1987, he joined Tata Institute of Fundamental Research where he served as a member of faculty till 2001. Subsequently, he went back to the US and joined the University of Kentucky College of Arts and Sciences where he holds the position of a professor. In between, he had a short stint at Kavli Institute for the Physics and Mathematics of the Universe during 2009–10 as a senior associate. He also served as a visiting scientist at Massachusetts Institute of Technology, Stanford University, Princeton University and Harvard University and as a visiting faculty at University of Chicago and Rutgers University.
The principal focus of Das' research was string theory. His work is reported to have assisted in resolving the information paradox with regard to black holes. His studies have been documented by way of a number of articles[note 2] and the online article repository of the Indian Academy of Sciences has listed 86 of them. He has also worked as a Research Professor in 2010 to predict size and distance of galaxies with the application of string theory, a project funded by the University of Kentucky. The lectures delivered by him include the one on "Holography, Cosmology and Quantum Quench" delivered at the University of Kyoto on June 2, 2014.
Das was a gold medalist in both his graduate and master's examinations. The Council of Scientific and Industrial Research awarded him the Shanti Swarup Bhatnagar Prize, one of the highest Indian science awards in 1998. The Indian Academy of Sciences elected him as a fellow the same year.