www.IndianJournals.com Members Copy, Not for Commercial Sale Downloaded From IP - 103.159.151.94 on dated 5-Jun-2023 45 Informatics Studies 5(3), July – September, 2018 Half a Century of Research in Theoretical Physics by E C G Sudarshan: A Bibliometric Study Gilu G. Ettaniyil Informatics Studies. ISSN 2320–530x. Vol. 5, Issue 3 Second Quarterly Issue. July – September, 2018. P 45-71 E.C.G. Sudarshan born in India spent most part of his career at University of Texas. He is one of the world’s most noted theoretical physicist and has been been credited with numerous contributions to the field of Theoretical Physics including optical coherence, Sudarshan-Glauber representation, V-A theory, Tachyons, Quantum Zeno effect, open quantum system and Lindblad equation, spin– statistics theorem, non-invariance groups, positive maps of density matrices, quantum computation among others. He received numerous international awards and many Universities conducted seminars and conferences to discuss his research contributions. This complilation is a simple bibliographic analysis of Sudarshan’s research contributions prpared in his remembrance. The details of works collected are grouped into three. First is published works availble in different libraries and archives. Second group is publications about which details only is available but published copies could not be avtraced out. Third group is unpublished papers avilable in official and personal collections of universites and scientists. Most of these documents; published papers and unpublished manuscripts are availble in Texas University Archives. Year -wise Distribution Sudarshan’s Research Publications Table 1 shows year wise distribution of papers published based on ten year interval during 1953- 2013. Scores indicate that 468 scientific papers were published during these sixty years. Thus an average 8 articles were published yearly throughout this period. It is observed that highest number of publications occurred during 1983-1992, ie. 110 publications (23.50%). The number of papers are above average during these time interval. Abstract There are two types of genius. Ordinary geniuses do great things, but they leave you room to believe that you could do the same if only you worked hard enough. Then there are magicians, and you can have no idea how they do it’ Hans Bethe once said. According to Anand Narayan ‘In the world of science, every so often we come across visionaries, ‘magicians’ in the words of Bethe, who dare to perceive the world in ways no one else has before. E.C. George Sudarshan is one of them. From formulating fundamental ideas in particle physics to understanding the quantum nature of light, Dr. Sudarshan’s contributions to physics read like a fascinating chapter from the book of breakthroughs in science of the past century’.