> On 29 Oct 2019, at 16:43, Lawrence Crowell <[email protected]> > wrote: > > On Tuesday, October 29, 2019 at 2:31:14 AM UTC-6, Philip Thrift wrote: > > > On Monday, October 28, 2019 at 7:21:40 PM UTC-5, Lawrence Crowell wrote: > On Monday, October 28, 2019 at 8:24:39 AM UTC-6, John Clark wrote: > On Sun, Oct 27, 2019 at 8:56 PM Alan Grayson <[email protected] <>> wrote: > > On Sunday, October 27, 2019 at 10:04:42 AM UTC-6, Lawrence Crowell wrote: > Quantum mechanics makes no particular prediction on the continuity of > spacetime. If one equates the Schwarzschild radius with a Compton wavelength > you get the Planck scale of 1.6x10^{-35}m. However, this really just tells us > one is not able to locate a qubit in a region smaller than this scale. The > Fermi and Integral spacecraft data on arrival times of different wavelengths > of radiation from burstars indicates spacetime is smooth to two orders of > magnitude smaller than the Planck length. > > > You're out of my depth here. If the Schwartzshild radius has one value, and > > the Compton wavelength has another value, why would anyone want to equate > > them? AG > > The Compton wavelength of a particle is just the wavelength light would have > if the mass of the particle were converted to energy. As the wavelength gets > smaller the energy gets larger, at some point the energy gets so high and the > distance so small it turns into a Black Hole; that distance is the Planck > length the time it takes light to move that distance is the Planck Time and > the amount of mass required is the Planck Mass which is about the mass of a > flea egg. The most acceleration anything can have is the Planck Acceleration, > it is the amount of acceleration needed to move something from a speed of > zero to the speed of light in the Planck Time, and the hottest that things > can get is the Planck Temperature (1.4*10^32 Kelvin) because anything hotter > would start radiating Black Holes instead of Blackbody Radiation. Or at least > that's what Quantum Mechanics says, but if the evidence from the Fermi and > Integral spacecraft holds up and spacetime really is smooth then something is > wrong with this picture. > > John K Clark > > That is basically it. The Planck scale does not say that spacetime is sliced > and diced up into chunks. It just says that if you try to localize a qubit > onto a region smaller than √(Għ/c^3) ~ 1.6×10^{-35}m one gets a quantum of > black hole that conceals the qubit for a tiny time interval √(Għ/c^5) ~ > 5×10^{-44}sec before it explodes into a huge number of low mass particles. It > is a sort of Heisenberg microscope argument. > > The LQG machers were forced into a frantic fix on their loop theories that > had spacetime chopped up near the Planck scale. The data very much appears to > indicate that spacetime is not built up from chunks, but instead it may be > built from nonlocal quantum entanglements. So rather than spacetime being a > highly localized structure, with it might be added a lot of fine tuning of > variables, it is more an emergent phenomenon due to nonlocaly of QM and > entanglements. > > LC > > > Of course space being made of "variables" vs. foam is a more mathematically > Platonistic view. > > Emergent 4-dimensional linearized gravity from spin foam models > https://arxiv.org/pdf/1812.02110.pdf > <https://www.google.com/url?q=https%3A%2F%2Farxiv.org%2Fpdf%2F1812.02110.pdf&sa=D&sntz=1&usg=AFQjCNEvHw9-QxNM9tkpfXe2G2qqf4IB7Q> > > > In this paper, we show for the first time that smooth solutions of > 4-dimensional Einstein equation emerge from Spin Foam Models (SFMs) under an > appropriate semiclassical continuum limit (SCL). > > > > @philipthrift > > I downloaded this and I am aware of these ideas. I still prefer holographic > quantum entanglement.
Me too. It is by far more coherent with digital mechanism, but I cannot judge from the paper here.(I mean in any wish way, as I have to study it first, …). Bruno > It really is much simpler because the fundamental physics is on a lower > dimensional manifold. I will try to read this before too long however. > > 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] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/ce9ab848-9928-42ca-bbc3-237c594763e9%40googlegroups.com > > <https://groups.google.com/d/msgid/everything-list/ce9ab848-9928-42ca-bbc3-237c594763e9%40googlegroups.com?utm_medium=email&utm_source=footer>. -- 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/5EF8C3AF-B35F-4F72-9B66-9B6EE903436C%40ulb.ac.be.
