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Physicists propose test for loop quantum gravity
PhysOrg ^ | January 3, 2012 | Lisa Zyga

Posted on 04/07/2013 12:16:44 PM PDT by SunkenCiv

As a quantum theory of gravity, loop quantum gravity could potentially solve one of the biggest problems in physics: reconciling general relativity and quantum mechanics. But like all tentative theories of quantum gravity, loop quantum gravity has never been experimentally tested. Now in a new study, scientists have found that, when black holes evaporate, the radiation they emit could potentially reveal “footprints” of loop quantum gravity, distinct from the usual Hawking radiation that black holes are expected to emit.

In this way, evaporating black holes could enable the first ever experimental test for any theory of quantum gravity. However, the proposed test would not be easy, since scientists have not yet been able to detect any kind of radiation from an evaporating black hole...

In their study, the scientists have used algorithms to show that primordial black holes are expected to reveal two distinct loop quantum gravity signatures, while larger black holes are expected to reveal one distinct signature. These signatures refer to features in the black hole’s energy spectrum, such as broad peaks at certain energy levels.

Using Monte Carlo simulations, the scientists estimated the circumstances under which they could discriminate the predicted signatures of loop quantum gravity and those of the Hawking radiation that black holes are expected to emit with or without loop quantum gravity. They found that a discrimination is possible as long as there are enough black holes or a relatively small error on the energy reconstruction.

While the scientists have shown that an analysis of black hole evaporation could possibly serve as a probe for loop quantum gravity, they note that one of the biggest challenges will be simply detecting evaporating black holes.

(Excerpt) Read more at phys.org ...


TOPICS: Astronomy; Science
KEYWORDS: loopquantumgravity; stringtheory; xplanets
Artist's illustration of loop quantum gravity.

Physicists propose test for loop quantum gravity

1 posted on 04/07/2013 12:16:44 PM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...
Loop Quantum Gravity (LQG)
Google

2 posted on 04/07/2013 12:17:14 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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http://www.google.com/search?q=Physicists+propose+test+for+loop+quantum+gravity+site:Freerepublic.com


3 posted on 04/07/2013 12:17:32 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: KevinDavis; annie laurie; Knitting A Conundrum; Viking2002; Ernest_at_the_Beach; Mmogamer; ...
 
X-Planets
· join · view topics · view or post blog · bookmark · post new topic · subscribe ·
Google news searches: exoplanet · exosolar · extrasolar ·

4 posted on 04/07/2013 12:18:07 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: 6SJ7; AdmSmith; AFPhys; Arkinsaw; allmost; aristotleman; autumnraine; Beowulf; Bones75; BroJoeK; ...

· String Theory Ping List ·
Silly String Ordinance
· Join · Bookmark · Topics · Google ·
· View or Post in 'blog · post a topic · subscribe ·


5 posted on 04/07/2013 12:19:58 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv

Thanks SunkenCiv. Lots of ‘Black Hole’ stuff lately.. interesting..


6 posted on 04/07/2013 12:48:58 PM PDT by Track9 (hey Kalid.. kalid.. bang you're dead)
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To: SunkenCiv; Slings and Arrows

7 posted on 04/07/2013 2:04:33 PM PDT by martin_fierro (< |:)~)
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To: martin_fierro

Alternate caption: “Upon opening Schrödinger’s box ...”


8 posted on 04/07/2013 2:49:19 PM PDT by NonValueAdded (If you can keep your head when all about you are losing theirs, you've likely misread the situation.)
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To: martin_fierro; SunkenCiv; NonValueAdded

9 posted on 04/07/2013 3:09:34 PM PDT by Slings and Arrows (You can't have IngSoc without an Emmanuel Goldstein.)
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To: SunkenCiv
They need to put these guys on the job...

10 posted on 04/07/2013 3:26:31 PM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both)
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To: SunkenCiv

So.....goalposts are made in black holes. I knew it. I just knew it.


11 posted on 04/07/2013 3:36:03 PM PDT by blueunicorn6 ("A crack shot and a good dancer")
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To: blueunicorn6

Black holes evaporate? This proves my THE UNIVERSE IS MADE OF PEPSI THEORY.


12 posted on 04/07/2013 3:39:59 PM PDT by blueunicorn6 ("A crack shot and a good dancer")
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To: blueunicorn6

Which proves my theory obama isn’t really black. He is just so dense light bends around him.


13 posted on 04/07/2013 5:06:22 PM PDT by bigheadfred
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To: bigheadfred

“Which proves my theory obama isn’t really black. He is just so dense light bends around him.”

May I buy that statement. Do you give discounts?


14 posted on 04/07/2013 5:12:24 PM PDT by notted
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To: bigheadfred
Which proves my theory obama isn’t really black. He is just so dense light bends around him.

That issue is easily fixed by an Executive Order revoking the laws of Physics.

15 posted on 04/07/2013 5:19:51 PM PDT by Senator_Blutarski
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To: SunkenCiv

Good find, thanks.


16 posted on 04/07/2013 8:02:35 PM PDT by Graewoulf (Traitor John Roberts' Commune-Style Obama'care' violates U.S. Constitution AND Anti-Trust Law.)
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To: martin_fierro

oooh, that looks like a great candidate to replace the “cat struggling with string theory” graphic that disappeared.


17 posted on 04/07/2013 8:10:03 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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