Tiruppattur Venkatachalamurti Ramakrishnan FRS (born 14 August 1941) is an Indian theoretical physicist known for his contributions in condensed matter physics.

Ramakrishnan has made seminal contributions to the scaling theory of electron localization.

[2] He has made contributions to the theory of liquid to solid transition and of mixed valence systems.

[7] His certificate of election reads: Professor Ramakrishnan has made crucial contributions to our understanding of condensed many body systems.

In a third area, namely mixed valence in rare-earth metals, his work on the inverse orbital degeneracy expansion has had a major effect on the field [8] This article about an Indian scientist is a stub.