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Oct 24, 2019 at 2:19 comment added G. Smith There is no accepted theory of quantum gravity. I’m not sure what you mean by effective quantum gravity.
Oct 24, 2019 at 2:05 comment added Árpád Szendrei Thank you so you say that gravity has no such quantum field description right (no accepted quantum gravity, just effective quantum gravity calculations) right?
Oct 24, 2019 at 1:57 comment added G. Smith @ÁrpádSzendrei That’s a reasonable way to look at it. But what I meant is that gravity is completely described by the metric tensor, which represents the geometry of spacetime. Other forces and particles are described by quantum fields which exist in spacetime and affect spacetime geometry through their energy and momentum but don’t represent that geometry.
Oct 24, 2019 at 0:52 comment added Árpád Szendrei "quantum fields for quarks, charged leptons, neutrinos, photons, weak bosons, gluons, and Higgs exist in spacetime but are not part of the geometry of spacetime. Only gravitation currently has an accepted geometrical explanation. The electromagnetic, weak, and strong forces do not." Can you please elaborate on that? Do you mean that we usually say that gravity curves spacetime, because all particles interact with the gravitational field, and all these particles will have an altered trajectory? The EM field does not have this, because only EM charged particles will have an altered trajectory?
Oct 23, 2019 at 22:47 history edited G. Smith CC BY-SA 4.0
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Oct 23, 2019 at 22:38 history edited G. Smith CC BY-SA 4.0
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Oct 23, 2019 at 22:33 history answered G. Smith CC BY-SA 4.0