 At PAEC, he directed the mathematical research directly involving the theory of general relativity, and helped establish the quantum computers laboratories at PAEC.Since theoretical physics plays a major role in identifying the parameters of nuclear physics, Siddiqui started the work on special relativity's complex applications, the 'relativity of simultaneity'.His Mathematical Physics Group undertook the research and performed calculations on the 'relativity of simultaneity' during the process of weapon detonation, where multiple explosive energy rays are bound to release in the same isolate and close medium at the same time interval.