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
  1. Does quantum field theory accept gravitational wave? As quantum field theory is flat spacetime theory, I wonder whether gravitational wave would be true.

  2. Does contemporary string theory variants accept gravitational wave?

share|cite|improve this question
Ask one question per "question". – dmckee Jun 4 '12 at 4:01
yes, all modern theories accept gravitational waves. I was going to write this as an answer, but the question is too broad. What problem do you have with gravitational waves? – Ron Maimon Jun 4 '12 at 5:03
@RonMaimon Gravitational waves are yet to be discovered... so that's why I am asking this question. – Albert Schewartz Jun 4 '12 at 5:07
@AlbertSchewartz: It depends on what you mean "discovered". Binary pulsars emit energy in a way completely consistent with gravitational waves going out and carrying away the energy. In this weak sense, they are already detected. The only reason it's weak is because we can't see the pulsars directly, only infer their orbit from their chirps, so we don't know for sure for sure that they aren't losing energy by gas-friction or some other way (although it would require conspiracy to reproduce the GR answer). This is good enough to convince me, but it might not be enough for you, I don't know. – Ron Maimon Jun 4 '12 at 6:05
As far as I understand gravitational waves can be formed in the limit of GR (limit=no quantum effects and thus no quantum gravity). Whether gravitational field and thus gravitational waves should be quantized is another question. – Otto Oct 8 '15 at 1:40

Your Answer


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

Browse other questions tagged or ask your own question.