Is time quantized?

Asked by: Chris Ingram

Answer

I guess that the simplest answer to this would be: 'Yes, everything is quantized.' However, unfortunately this is one of the biggest problems in modern physics. No-one is really sure how it should be quantized but the idea of quantized time as well as quantized space and quantized gravity is part of the elusive theory of quantum gravity.

Some of the best minds in the world have been tackling the problem for years now. Einstein failed to united quantum theory with his own relativity, Richard Feynman couldn't do it (although QED was a definite step forwards) and even today some of our most famous physicists such as Kip Thorne, Stephen Hawking and Roger Penrose are still unable to unite quantum theory and relativity.

In answer to your question then. Yes, time is theoretically quantized and in an ultimate field theory it would be a quantized field much the same as the particle fields that we can already see in unified field theories. However, no-one has yet been able to come up with a consistent theory of space, time, fields and matter which shows exactly how time is quantized.
Answered by: Edward Rayne, Physics Undergraduate Student, Cambridge UK