B Unitarity in GR+QFT: Obeying Full QG Model?

[Question69]

Does unitarity have to be obeyed in a full quantum gravity model?

 

[A. Neumaier]

This depends on what the final unified theory will look like.

The big bang and black hole thermodynamics are quite likely inconsistent with unitarity. So something must be discarded. Different researchers have different preferences.

But this thread belongs to another forum - https://www.physicsforums.com/forums/beyond-the-standard-model.66/

 

[PeterDonis]

Does unitarity have to be obeyed in a full quantum gravity model?

As @A. Neumaier says, it depends on the model. And nobody currently has one that works. But in any case, we can't discuss "quantum gravity" in the abstract. Discussion needs to be about some particular model that has been published in a peer-reviewed paper. And, as @A. Neumaier correctly points out, such discussions belong in the Beyond the Standard Model forum.

This thread is closed.