Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What lessons do we have from string theory regarding the fate of singularities in general relativity?

What happens to black hole singularities? What happens to cosmological singularities?

Which points of view on string theory yielded results in this respect? String field theory? AdS/CFT? Matrix theory? I suppose perturbative string theory is not applicable in the vicinity of singularities.

share|cite|improve this question
Is there a way to narrow this down? The story of timelike singularities (orbifolds, conifolds etc.) is well digested and you are asking for a review of thousands of papers. Are you maybe interested in more specific types of singularities? – user566 Oct 26 '11 at 20:18
Well, I mentioned black hole and cosmological singularities which are spacelike. Indeed I'm interested only in the spacelike case. – Squark Oct 26 '11 at 21:00
Excellent, thanks, this does narrow it down quite a bit... – user566 Oct 26 '11 at 21:02
Also, my 1st sentence alludes to the classical problem of singularities in general relativity which a theory of quantum gravity is supposed to solve. Compactification on singular manifolds (which I think you're referring to) is a way to introduce an additional sort of singularities special to string theory (more generally Kaluza-Klein) and unnecessary in classical general relativity. – Squark Oct 26 '11 at 21:03
That’s kind of semantics, but spacelike singularities is definitely a well-defined characterization. – user566 Oct 26 '11 at 21:06

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.