On Friday, July 17, 2020 at 4:48:51 AM UTC-6, Lawrence Crowell wrote: > > On Friday, July 17, 2020 at 5:01:41 AM UTC-5 [email protected] wrote: > >> >> >> On Thursday, July 16, 2020 at 7:50:07 PM UTC-6, Alan Grayson wrote: >>> >>> >>> >>> On Thursday, July 16, 2020 at 5:08:57 PM UTC-6, Lawrence Crowell wrote: >>>> >>>> Gravitons do not escape from a BH, any more than can light. However, >>>> from the perspective of an outside observer all matter than went into a BH >>>> is on the surface above the event horizon, called the stretched horizon. >>>> >>>> LC >>>> >>> >>> Gravitons might not exist (and hence quantum gravity can't exist) But >>> whatever the case, how can BH's interact gravitationally with objects >>> beyond its event horizon? You say this doesn't happen. I don't understand >>> your argument. AG >>> >> > That you are saying this illustrates you do not understand general > relativity. > > >> >> I may have identified the thousand pound gorilla in the room; the >> hypothetical force carrying particle of the quantum gravitating field, the >> graviton, which for BH's doesn't exert any force! AG >> > > I have no idea why you are saying this. Gravitation is not a force in the > usual sense and so the graviton does not produce a force in the standard > meaning. For the weak field limit the nonlinear terms are negligable and a > gravitational wave is linear. This is easily quantized. In fact it is > similar to the Hanbury-Brown and Twiss theory of the diphoton. It is when > the field becomes strong that general relativity becomes nonlinear and runs > into trouble with quantum mechanics. > > LC >
I assumed a quantum field theory of gravity must have a particle associated with it, and that this particle is called the graviton. Gravity is a fictitious force. So what would the role of the graviton be, if not to produce some force? If you detect gravitational waves, don't they consist of gravitons if a quantum theory of gravity exists, analogous to photons in EM waves? AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/cb8210ad-edb5-49b4-9664-382389ed8cbdo%40googlegroups.com.
