Renormalisation of postquantum-classical gravity · HackerPapers discussions

Renormalisation of postquantum-classical gravity — mentioned by raattgift

Sat, 16 Mar 2024 13:58:34 GMT

Sure, but the origin of this preprint is in the stochastic-classical/uncertain-quantum "postquantum-classical" theory the Oppenheim group is working on. Their theory is premised on a weakening of the gravitational interaction at short distances (it's "asymptotically free" and thus renormalizable) compared to perturbative quantum gravity (which is non-renormalizable by power counting). However, they discovered that the gravitational interaction in their theory can be too strong. More technically, in their diffusion limit they extract a different scalar potential than from GR's weak field…

Paper and discussion history. A mention is not an endorsement.

Renormalisation of postquantum-classical gravity — mentioned by raattgift

Sat, 09 Mar 2024 14:43:24 GMT

> Good. Is it, or isn't it, and why? You don't say. The authors asked themselves how their quantum gravity theory differs from General Relativity, and whether the successes of General Relativity in astrophysical settings would be fatal if their theory has strong differences, and that's the basis for this paper. The tl;dr is that their theory predicts different trajectories outside of large central masses, but that might not conflict with evidence from galactic-dynamics astronomy. This is the second paper released in the past few days by the University College London Oppenheim group. It's a…

Paper and discussion history. A mention is not an endorsement.