Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

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

Is there any simple proof of the no-ghost theorem in string theory?

share|cite|improve this question
It depends whether the demonstration of the equivalence with the light-cone gauge spectrum - which is manifestly ghost-free - is simple in your opinion. – LuboŇ° Motl May 19 '11 at 7:21
A couple of references: (1) P. Goddard and C. B. Thorn, Phys. Lett. B40 (1972) 235; (2) Green, Schwarz and Witten, "Superstring Theory, Vol 1"; (3) Wikipedia – Qmechanic May 19 '11 at 18:57

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.