On 30 Oct 2013, at 08:32, Chris de Morsella wrote:

Bruno ~ I believe Quantum loop gravity depends on a fine grain structure existing in spacetime.

Yes. I agree. I find this natural with GR and QM, but comp imposes some continuum, and if it is given by space, that would simplify the recovering of physics from arithmetic. (cf UDA-7).



These results would seem to falsify it therefore. Spacetime on the very small scale appears to be smoothly continuous. I would like to see these results reconfirmed though;

Me too.


not casting doubt on the experimental methodology or the ESA science team. Quite the opposite I think it is an elegant and powerful leveraging down into being able to make inferences about scales I believed would be almost forever out of our reach. Kind of makes one speculate – and I do that easily LOL – if any similar type experiments could be devised to measure properties of high energy photons that have traversed enormous distances of spacetime in order to perhaps determine if those vibrating strings and things are more than beautiful math. What amazes me is how they were able to use the lever of the vast distances traversed by these high energy photons and very accurately measure properties of these photons and be able to use the vast distance itself like a kind of lever to be able to infer this about a scale that is so far beyond anything that we can directly measure or discern that it might as well have been in some elfin land of middle earth.

I agree. I am far from being an experimentalist, and cannot judge the accuracy of such incredible experiments, so I wait for more data and more confirmations to have a sort of local opinion on this.

Bruno




-Chris

From: everything-list@googlegroups.com [mailto:everything-list@googlegroups.com ] On Behalf Of Bruno Marchal
Sent: Tuesday, October 29, 2013 10:43 AM
To: everything-list@googlegroups.com
Subject: Re: Universe from Pixels?


On 29 Oct 2013, at 17:12, Chris de Morsella wrote:


If true – ESA experimental measurements of the polarization of ranges of gamma rays (over a range of energies) from very distant gamma ray bursts that have travelled across billions of light years of spacetime to reach earth. Their experiments determined that spacetime does not have a granular structure, which would have had a measurable effect on the polarization of these distant gamma rays, down to a level of 10^-48 m (which is exceedingly small)) trillions of times smaller than the Planck scale. Spacetime does not appear to be granular – at least down to these incredibly small scales. These results have lead me to question any hypothesis that seems to depend on spacetime having a discreet granular structure.

Do you know if those are the results considered as "refuting" "loop gravity"?

In fact, I find intuitive that a quantized gravitation lead to a quantization of space-time curvature, and itself, but comp seems to fit better with continuous space time, as it multitplies the comp- histories in a very smooth way. In the universal dovetailing, the winner "universal subdovetailers on the programs defined on some "rich ring" structure, might be the winner, but of course that remains to be shown.

Those questions are very hard.

Bruno






From: everything-list@googlegroups.com [mailto:everything-list@googlegroups.com ] On Behalf Of spudboy...@aol.com
Sent: Tuesday, October 29, 2013 7:04 AM
To: everything-list@googlegroups.com
Subject: Universe from Pixels?

Here is a link, which makes things seem very, curious, if true.

http://www.dailygalaxy.com/my_weblog/2013/10/our-universe-is-made-up-of-indivisible-building-blocks-like-tiny-atoms.html#more


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http://iridia.ulb.ac.be/~marchal/



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