Chennai Mathematical Institute


Physics Seminar
Date: Friday, 22 April 2022
Time: 11.00 am
Venue: Lecture Hall 1, CMI
Simple experiments to probe parity violation in Gravitation, and their theoretical implications

N.D. Hari Dass
Retd. Senior Professor, Institute of Mathematical Sciences, Chennai.


In 1975 I had proposed some very simple experiments to probe discrete symmetry violations in gravitation. The experiment in itself was a sort of gravitational analog of the famous Ramsey expt for measuring EDM. Subsequently, several experimental groups, even to this day, are improving the precisions of the proposed experiment. The theoretical implications of a positive outcome for such tests are enormous. Among them would be the breakdown of Einstein’s general relativity theory. I will also discuss some future possibilities for experiments.


1. N.D. Hari Dass, Tests for C,P,T violations in gravitation, Phys.Rev.Lett. 36 No. 8 393 (1976).

2. N.D. Hari Dass, Experimental tests for some quantum effects in gravita- tion, Ann. Phy. 107 337 (1977).

3. N.D. Hari Dass, Cold atoms for testing quantum mechanics, and, parity violation in gravitation, arXiv:9908085 v1[quant-ph.