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Although LIGO at 2016 verified the speed of a traverse gravitational wave being the speed of light in a vacuum $c$ there is also the fact that gravity is a non-local phenomenon, meaning that it is not only affected by the distribution of matter and energy in a given point, but also by the distribution of matter and energy throughout the entire universe. Thus, gravity when examined with the whole universe being a covariant static field and frame of reference, is actually in an entangled state thus non-local and instantaneous "spooky action at a distance".

My question is, how general relativity deals with this non-locality problem of gravity and what quantum gravity theory has to say about it?

Markoul11
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A possible explanation of gravity acting as a static non-local field throughout all of the universe is that the vacuum is a sea of gravitons condensate where all the gravitons are in an entangled state with each other acting like a giant singlet.

Of course we hit a wall here because the graviton renormalization problem.

Markoul11
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