Light completely stopped for a record-breaking minute

Conspirator
User avatar
Posts: 2477
Joined: Sun Aug 23, 2009 1:09 pm

PostFri Jul 26, 2013 11:38 am » by Tjahzi


The fastest thing in the universe has come to a complete stop for a record-breaking minute. At full pelt, light would travel about 18 million kilometres in that time – that's more than 20 round trips to the moon.

"One minute is extremely, extremely long," says Thomas Krauss at the University of St Andrews, UK. "This is indeed a major milestone."

The feat could allow secure quantum communications to work over long distances.

While light normally travels at just under 300 million metres per second in a vacuum, physicists managed to slow it down to just 17 metres per second in 1999 and then halt it completely two years later, though only for a fraction of a second. Earlier this year, researchers kept it still for 16 seconds using cold atoms.
Stripy light

To break the minute barrier, George Heinze and colleagues at the University of Darmstadt, Germany, fired a control laser at an opaque crystal, sending its atoms into a quantum superposition of two states. This made it transparent to a narrow range of frequencies. Heinze's team then halted a second beam that entered the crystal by switching off the first laser and hence the transparency.

The storage time depends on the crystal's superposition. A magnetic field extends it but complicates the control laser configuration. Heinze's team used an algorithm to "breed" combinations of magnet and laser, leading them to one that trapped light for a minute.

They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.

Tens of seconds of light storage are needed for a device called a quantum repeater, which would stop and then re-emit photons used in secure communications, to preserve their quantum state over long distances.

It should even be possible to achieve longer light storage times with other crystals, says Heinze, as they have pushed their current material close to its physical limit.

Journal reference: Physical Review Letters, doi.org/m86


http://www.newscientist.com/article/dn23925-light-completely-stopped-for-a-recordbreaking-minute.html?cmpid=RSS|NSNS|2012-GLOBAL|online-news#.UfIs-KxafHN

That's some very, very fonky shit.
Image

Conspirator
User avatar
Posts: 1096
Joined: Sun Sep 16, 2012 1:21 pm
Location: "In life's litter tray......"

PostFri Jul 26, 2013 12:12 pm » by Webcat


They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.


Like, maybe human DNA?

:think:

:cheers:
Image

Conspirator
User avatar
Posts: 2477
Joined: Sun Aug 23, 2009 1:09 pm

PostFri Jul 26, 2013 12:20 pm » by Tjahzi


Webcat wrote:
They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.


Like, maybe human DNA?

:think:

:cheers:


nice thinking :flop:
Image

Conspirator
User avatar
Posts: 7683
Joined: Thu Dec 16, 2010 7:14 am

PostFri Jul 26, 2013 8:01 pm » by 99socks


Webcat wrote:
They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.


Like, maybe human DNA?

:think:

:cheers:



Sounds more like a fiber-optics kind of explanation for quantum computing.
Image

Conspirator
User avatar
Posts: 2224
Joined: Sun Sep 02, 2007 9:06 pm
Location: Just About Everywhere

PostFri Jul 26, 2013 8:28 pm » by Rizze


Webcat wrote:
They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.


Like, maybe human DNA?

:think:

:cheers:


Mice now humans next? Researchers created memories in mice using light pulses on the brain cells that control recall
Could be related on a smaller scale, who knows?
:peep:
Image

http://ufomaniacs.blogspot.com/
http://tiny.cc/Rizzesearch
"The greatest things on earth are us,supposedly.
Why don't we act accordingly, with humanity" Rizze

Conspirator
User avatar
Posts: 1096
Joined: Sun Sep 16, 2012 1:21 pm
Location: "In life's litter tray......"

PostSat Jul 27, 2013 10:25 am » by Webcat


99socks wrote:
Webcat wrote:
They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.


Like, maybe human DNA?

:think:

:cheers:



Sounds more like a fiber-optics kind of explanation for quantum computing.


:hiho: back 99socks :flop:

Nice to see your still around!

:sunny:

:cheers:
Image

Initiate
User avatar
Posts: 843
Joined: Wed Jul 21, 2010 8:41 pm

PostSat Jul 27, 2013 12:13 pm » by Bandanko


Rizze wrote:
Webcat wrote:
They also used the trap to store and then retrieve an image consisting of three stripes. "We showed you can imprint complex information on your light beam," says Heinze.


Like, maybe human DNA?

:think:

:cheers:


Mice now humans next? Researchers created memories in mice using light pulses on the brain cells that control recall
Could be related on a smaller scale, who knows?
:peep:


Mice and humans have incredibly similar nervous systems. what works on them generally works on us.

stopping light is pretty damn sweet tbh, why isn't this in the news instead of the name of some idiot baby...



  • Related topics
    Replies
    Views
    Last post
Visit Disclose.tv on Facebook