In August 2009, he got PhD from the Indian Institute of Science, Bangalore at the age of 21 years by submitting a thesis of only 33 pages.

He received wide public attention in 2001, when he was shortlisted by the Indian Government's Department of Science and Technology (DST) to participate in a Nobel laureates conference in Germany.

[8] Tulsi was admitted by the Indian Institute of Science (IISc),[9] where his PhD thesis was on "Generalizations of the Quantum Search Algorithm".

Tathagat Avatar Tulsi participated in the Stock Exchange of Visions project of Fabrica, Benetton's research centre in 2007.

The episode named "India's Geniuses" was aired on 13 December 2007 and was hosted by Bollywood actress Konkona Sen Sharma.