On Saturday, February 23, 2019 at 6:04:15 PM UTC-6, agrays...@gmail.com 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 <agrays...@gmail.com> 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
