Ennackal Chandy George Sudarshan (also known as E. C. G. Sudarshan;(Malayalam: എണ്ണയ്‌ക്കൽ ചാണ്ടി ജോർജ് സുദർശൻ ); born 16 September 1931) is an Indian theoretical physicist and a professor at the University of Texas. Sudarshan has 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, Spin-statistics theorem, non-invariance groups, positive maps of density matrices, quantum computation among others. His contributions include also relations between east and west, philosophy and religion.