On Friday, February 19, 2021 at 1:53:14 PM UTC-6 [email protected] wrote: > On Fri, Feb 19, 2021 at 2:17 PM Lawrence Crowell <[email protected]> > wrote: > > > *If you probe spacetime with extremely high energy in a Heisenberg >> microscope setting you will get wild tumble of fluctuations and foam.* > > > Maybe, maybe not, 3 of the 4 forces of nature certainly fluctuate wildly > when things get small but what about gravity, aka spacetime? Spacetime foam > has been theorized but never actually observed because the high energy > conditions needed have never been reached experimentally. Quantum Mechanics > says you will see a spacetime foam If you ever make a particle > accelerator powerful enough to reach the Planck level, but General > Relativity says you will not. Who's right? > John K Clark See what's on my new list at Extropolis > <https://groups.google.com/g/extropolis> >
Getting to Planck energy is of course a practical issue. This is not necessarily an issue with fundamental physics. However, in the weak field limit we have gravitational memory that is an abelian symmetry identified with I^+, in addition to the Lorentz symmetry at i^+/. Then even in a weak field limit, say the detection of gravitational waves from colliding black holes, we have find a signature of this foaminess of spacetime at much higher energy. LC -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/3126a1c2-71c0-4ae1-9d7a-86d4d07bc071n%40googlegroups.com.
