On 7/23/2020 8:03 PM, Alan Grayson wrote:
If such a theory could be constructed, it would have particles to manifest excited states, called gravitons. But for a BH, gravitons generated by its mass couldn't escape, so they couldn't function as force carrying particles as in other quantum field theories.
That's nonsense. Gravitons are linearized solutions of the weak field equations and you're saying they can't escape from a region of infinite curvature...see the problem?
We'd still need Einstein's GR to account for the gravitational "force" via curvature of space-time. So what would a quantum theory of gravity buy us? Why do we need it? AG
We need it because Einstein's equation has classical field variables on the left and quantum field densities on the right.
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