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splendidusfollowshare
1-16-2009 2:50 PM
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splendidus says:
'If space-time is a grainy hologram, then you can think of the universe as a sphere whose outer surface is papered in Planck length-sized squares, each containing one bit of information. The holographic principle says that the amount of information papering the outside must match the number of bits contained inside the volume of the universe.

Since the volume of the spherical universe is much bigger than its outer surface, how could this be true? Hogan realised that in order to have the same number of bits inside the universe as on the boundary, the world inside must be made up of grains bigger than the Planck length. "Or, to put it another way, a holographic universe is blurry," says Hogan.

"Contrary to all expectations, it brings its microscopic quantum structure within reach of current experiments"

"If you lived inside a hologram, you could tell by measuring the blurring,"
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1-16-2009 3:07 PM
splendidus
So would they be able to detect a holographic projection of grainy space-time? Of the five gravitational wave detectors around the world, Hogan realised that the Anglo-German GEO600 experiment ought to be the most sensitive to what he had in mind.
In June he sent his prediction to the GEO600 team.
GEO600's principal investigator Karsten Danzmann of the Max Planck Institute for Gravitational Physics in Potsdam, Germany, and also the University of Hanover, admits that the excess noise, with frequencies of between 300 and 1500 hertz, had been bothering the team for a long time. He replied to Hogan and sent him a plot of the noise. "It looked exactly the same ...
1-16-2009 4:38 PM
tidbit2
I've read a book about this called the holographic universe by michael talbot
And it's not that new was thought up a few decades ago by two men (independently) karl pribram and David bohm
Who suggested the holographic theory and that what we experience as reality is a "holomovement"
This looks like gobbidlegook to me compared to what i've read before
1-16-2009 6:42 PM
splendidus
Mybe my title-selection was a bit indefinite.
With "new theory" I didn't mean the "holographic theory" itself.

I meant the theory or "idea" of Hogan about its possible consequences and how they might be measured (by measuring the blurriness).

But I didn't read the book you noted, so I don't know if this idea is mentioned there (I took a note of it and will try to find/read it).
1-16-2009 7:31 PM
abailart
Thanks to tidbit who recommended it to me on www.goodreads.com (which he also recommended to clippers some time ago) I have read the book, and my review is up there. I tend to agree with splendidus that the new theory referenced here is a specific within the broad spectrum of the 'holographic universe theory'. Its specificity means that it offers very precise directions towards clear cur hypothesis testing via scientific methodology. Whatever, thanks again to tidbit and to splendidus for the clip.
1-17-2009 12:55 PM
tidbit2
you'll find the book and reviews here
http://www.goodreads.com/book/show/319014.The_Holographic_Universe
also new people are welcome
if we had enough members we could set up a clipmarks users group on it
http://www.goodreads.com
1-17-2009 1:17 PM
splendidus
I am a member on goodreads and added the book to my "to-read" shelf already, upon the note of abailart.
But thank you for the link nevertheless...

I think the clipmarks users group is a good idea! Maybe there are already enough members?
1-17-2009 7:11 PM
tidbit2
maybe if we had a clip on starting a clipmarks readers group
and a roll call of everyone who is already there
and who wants to join
1-17-2009 7:14 PM
tidbit2
heres my books
http://www.goodreads.com/review/list/336620
just add me to your friends y'all
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