34 ms·
In the classical sense of "a QFT" then no there are no ways to do QG. The computations diverge. In the extended sense where you let yourself include non-QFT-lik
by lanza 3y ago
In the classical sense of "a QFT" then no there are no ways to do QG. The computations diverge. In the extended sense where you let yourself include non-QFT-like things like strings and spin foams, then sure.
- sojuz151 3y agoBut the fact that the computation diverges is not a problem by itself. All QFT diverge but this can be fixed by renormalisation. Problem is that for gravity this would require infinity many parameters and the theory could match any observation
- andyferris 3y agoMy understanding was that renormalization only needs "parameters" when the computational methods are approximate. I thought the issue was more that we have no idea how to perform appropriate calculations for SM+QG? Maybe I'm wrong?