Is time quantized? In other words, is there a fundamental unit of time that could not be divided into a briefer unit?

Captured From: http://www.scientificamerican.com Another, somewhat iconoclastic perspective on this question comes from William G. Tifft, a professor of astronomy at the University of Arizona: “There are several ways to answer this question. 1) There is no conclusive evidence that time is quantized, but 2) certain theoretical studies suggest that in order to unify general relativity (gravitation) with the theories of quantum physics that describe fundamental particles and forces, it may be necessary to quantize space and perhaps time as well. Time is always a 1-dimensional quantity in this case. 3) My own work, which combines new theoretical ideas with observations of … More