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Physicists find patterns in new state of matter
Physorg.com ^ | 3/29/2012 | Physorg.com

Posted on 03/29/2012 4:45:02 PM PDT by U-238

In a paper published in the March 29 issue of the journal Nature, the scientists describe the emergence of “spontaneous coherence,” “spin textures” and “phase singularities” when excitons—the bound pairs of electrons and holes that determine the optical properties of semiconductors and enable them to function as novel optoelectronic devices—are cooled to near absolute zero. This cooling leads to the spontaneous production of a new coherent state of matter which the physicists were finally able to measure in great detail in their basement laboratory at UC San Diego at a temperature of only one-tenth of a degree above absolute zero.

The discovery of the phenomena that underlie the formation of spontaneous coherence of excitons is certain to produce a better scientific understanding of this new state of matter. It will also add new insights into the quirky quantum properties of matter and, in time, lead to the development of novel computing devices and other commercial applications in the field of optoelectronics where understanding of basic properties of light and matter is needed.

The research team was headed by Leonid Butov, a professor of physics at UC San Diego who in 2002 discovered that excitons, when made sufficiently cold, tend to self-organize into an ordered array of microscopic droplets, like a miniature pearl necklace.

(Excerpt) Read more at physorg.com ...


TOPICS: Miscellaneous
KEYWORDS: astrophysics; matter; physics; quantumphysics; stellarscience; stringtheory

1 posted on 03/29/2012 4:45:08 PM PDT by U-238
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To: U-238

Maybe they like to huddle together when it gets real cold.


2 posted on 03/29/2012 4:48:58 PM PDT by UCANSEE2 (Lame and ill-informed post)
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To: AdmSmith; bvw; callisto; ckilmer; dandelion; ganeshpuri89; gobucks; KevinDavis; Las Vegas Dave; ...

Thanks U-238.


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3 posted on 03/29/2012 4:53:06 PM PDT by SunkenCiv (I come to bury Caesar, not to praise him)
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To: U-238
Research into the fundamentals of the physical universe are all well and good but if you want money to follow up you will have to relate it to climate change.
4 posted on 03/29/2012 4:54:02 PM PDT by hinckley buzzard
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To: U-238
excitons

inspiring.

5 posted on 03/29/2012 4:54:02 PM PDT by the invisib1e hand (... ... ... ...)
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To: hinckley buzzard
Ok, so why do robots,left in the dark, huddle together?


6 posted on 03/29/2012 4:58:36 PM PDT by UCANSEE2 (Lame and ill-informed post)
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To: the invisib1e hand

http://www.bbc.co.uk/comedy/lookaroundyou/series1/periodic.shtml


7 posted on 03/29/2012 5:18:13 PM PDT by GraceG
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To: U-238

OK ! “UC boffins chuffed as ninepence to describe the emergence of spontaneous coherence”


8 posted on 03/29/2012 5:54:55 PM PDT by dr_lew
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To: the invisib1e hand

An exciton is extremely hard to detect but can be detected by other means.


9 posted on 03/29/2012 6:11:44 PM PDT by U-238
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To: GraceG
I don't know why that periodic table is funny but it is.

a little riffing in multiculturality.

Gawd the Brits do have THE sense of humor.

10 posted on 03/29/2012 6:19:50 PM PDT by the invisib1e hand (... ... ... ...)
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To: U-238
An exciton is extremely hard to detect but can be detected by other means.

Isn't the presence of excitons directly proportional to that of bosons?

11 posted on 03/29/2012 6:21:21 PM PDT by the invisib1e hand (... ... ... ...)
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To: the invisib1e hand

From what I understand,excitons are often treated as elementary bosons.As the density increases, the relative proportion of photon to exciton increases

http://144.206.159.178/ft/607/11922/241624.pdf


12 posted on 03/29/2012 6:26:53 PM PDT by U-238
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To: the invisib1e hand

I will stick to rudimentary”How Stuff Works” physics.


13 posted on 03/29/2012 6:37:55 PM PDT by U-238
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To: the invisib1e hand

I love how they admit that they are intentionally put Christianity LAST and then they almost forget about it....

That had to make a few people at the BBC cringe to realize they were calling them out on it.


14 posted on 03/29/2012 6:48:31 PM PDT by GraceG
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To: U-238
>>An exciton is extremely hard to detect but
>>can be detected by other means. 

Once upon a time this poster on the wall in a friend's room...



..,was all it took to detect my exciton.
 
Hmm, wait.  Well doggie,  it still works.   ;-)

15 posted on 03/29/2012 7:13:17 PM PDT by LomanBill (Animals! The DemocRats blew up the windmill with an Acorn!)
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To: U-238

bflr


16 posted on 03/29/2012 7:24:12 PM PDT by Captain Beyond (The Hammer of the gods! (Just a cool line from a Led Zep song))
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To: LomanBill

I agree.


17 posted on 03/29/2012 8:40:41 PM PDT by U-238
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To: LomanBill

Notice the presence of bosons — I tell you, there’s a connection!


18 posted on 03/30/2012 6:09:19 AM PDT by the invisib1e hand (... ... ... ...)
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To: U-238
Physicists find patterns in new state of matter

whatever you do, just don't call it a "design".

19 posted on 03/30/2012 2:32:06 PM PDT by the invisib1e hand (tick..tick..tick...)
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To: U-238
a pattern of spontaneous coherence is correlated with a pattern of spin polarization and with phase singularities in the coherent exciton gas.

If I only had a dollar for every time I've said that.

20 posted on 03/30/2012 2:51:43 PM PDT by GreenHornet
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To: SunkenCiv

Thanks SC. In the past, it was the Buddhas that described this kind of phenomena. Now of course, it’s our leading scientists. I think we’re getting somewhere!


21 posted on 04/01/2012 4:46:56 AM PDT by Track9 ("Strength through peace.. oh wait, I mean.." Mit Romney)
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