On Saturday, February 23, 2019 at 6:04:15 PM UTC-6, [email protected] wrote: > > > > On Saturday, February 23, 2019 at 6:53:09 AM UTC-7, Philip Thrift wrote: >> >> >> >> On Saturday, February 23, 2019 at 7:25:21 AM UTC-6, John Clark wrote: >>> >>> On Fri, Feb 22, 2019 at 11:08 PM <[email protected]> wrote: >>> >>> > *In GR, the paths are determined by geometry in the absence of >>>> forces, not by mediating particles.* >>> >>> >>> Yes, that's because General Relativity is a classical theory that is not >>> quantized, it has so far passed every experimental test posed to it with >>> flying colors but we know it can't be entirely correct because when we ask >>> it what happens when things become very small and very massive, such as in >>> the center of Black Holes, it gives the absurd answer of infinity. Neither >>> Quantum Mechanics or General Relativity works when things get massive and >>> small, perhaps quantizing General Relativity will fix this or maybe there >>> is some other way to do so. Nobody knows. >>> >>> > *I could be mistaken, but I see gravitons as being part of a >>>> distinct theory of gravity, which might give the same results as GR,* >>> >>> >>> Nobody has ever experimentally detected a graviton and it's extremely >>> unlikely anybody ever will, so if they make the same predictions as >>> standard General Relativity there would be no point in introducing the >>> idea. >>> >>> John K Clark >>> >>> >> >> If all experiments proposed to determine if gravity is quantized* fail* >> >> Such measurements, they say, could enable them to uncover the quantum >> nature of gravity and determine whether or not gravity is quantized. >> >> >> >> https://physics.aps.org/synopsis-for/10.1103/PhysRevLett.122.071101 >> >> >> that is: the search for a quantized gravity is a wild goose chase >> >> what do theorists do then? >> >> (I asked Hossenfelder. No answer.) >> >> - pt >> > > *The article you cite indicates increasing hypothetical sensitivity for > measuring gravity for tiny effects. If gravity can be quantized, what > exactly would be quantized? Bruce says that gravity waves would involve > gravitons under a quantized theory. Is that all? AG * >
I suppose it needs to defined *what an experiment would be* that would determine that gravity is quantized in a measurable way. Theories disconnected from experiments are mere math games. - pt -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
