Wednesday, January 18, 2017
Contact us    |    Advertise    |   Help   RSS icon Twitter icon Facebook icon
    Home  ·  News  ·  Forum  ·  Stories  ·  Image Gallery  ·  Columns  ·  Encyclopedia  ·  Videos
Find: in

Atoms reach record low temperature


Posted on Monday, 7 January, 2013 | Comment icon 27 comments | News tip by: B Randomly


Image credit: Wikimedia Commons

 
Scientists have found a way to achieve temperatures lower than the coldest temperature possible.

Absolute zero is minus 459.67 degrees Fahrenheit, the temperature at which atoms stop moving and the minimum temperature anything can possibly be - or at least that's what scientists thought. A team of researchers at the University of Munich in Germany have succeeded in turning this idea on its head by devising a concept of "negative temperature".

Because of the strange ways in which objects behave when cooled in to negative temperatures, the research could prove invaluable in the hunt for answers to some of science's biggest questions as well as providing new concepts for engine cooling. "A better understanding of temperature could lead to new things we haven't even thought of yet," said team scientist Ulrich Schneider. "When you study the basics very thoroughly, you never know where it may end."

"Absolute zero is often thought to be the coldest temperature possible."

  View: Full article |  Source: Live Science

  Discuss: View comments (27)

   


 
Recent comments on this story
Comment icon #18 Posted by sepulchrave on 8 January, 2013, 8:20
In my opinion, the article is definitely too sensational. The existence and the nature of negative temperatures - in the statistical mechanics sense - is well known. There is a reasonably extensive wiki article on the subject, the subject was treated theoretically as far back as 1951 (at least), and is discussed in Kittel and Kroemer's classic introductory text book on thermal physics. This may be the first experimental realization of negative temperatures though. I believe they measure with equations, In science lot of things can be measured with equations. Actually you are sort of correct (d... [More]
Comment icon #19 Posted by dan-paul-mark on 9 January, 2013, 1:24
this is just an idea but from what i read i got the impression that in normal possitive temperature conditions atoms have a force which repels other atoms away, so as a particle heats up and moves with more force it then pushes atoms around it to do the same. in negative energy the force is reversed to then pull sorrounding atoms causing them to slow down. is it possible that this could be linked with black holes and collapsing stars, is it poosible to use this to create extremely dense matter as possitive tempretures decreases the density of things?
Comment icon #20 Posted by csspwns on 10 January, 2013, 4:52
wtf this was my damn link
Comment icon #21 Posted by B Randomly on 15 January, 2013, 0:13
I did create a thread, (refer to OP)... it says it's merged, so maybe a double posted thread? You are more than welcome to have it, though.
Comment icon #22 Posted by Br Cornelius on 18 January, 2013, 17:41
I understood that absolute temperature is the absence of atomic motion, This represents an absolute state of existence - a thing is in motion or it is static. In this case anything other than stasis has a temperature. There has never been an atom reduced to absolute stasis, so what they are describing must be a statistical artifact of the system and not a deion of its real physical state. Am I wrong here ? Br Cornelius
Comment icon #23 Posted by sepulchrave on 20 January, 2013, 0:06
I understood that absolute temperature is the absence of atomic motion, This represents an absolute state of existence - a thing is in motion or it is static. In this case anything other than stasis has a temperature. There has never been an atom reduced to absolute stasis, so what they are describing must be a statistical artifact of the system and not a deion of its real physical state. Am I wrong here ? Br Cornelius I guess... ``sort of'' ? The temperature that you speak of is really only rigorously defined (in my opinion, anyway) in terms of a statistically large ensemble of non-interactin... [More]
Comment icon #24 Posted by Rolci on 1 July, 2013, 23:38
What I understand this article is trying to say is, if PV=NkT, and P is pressure meaning particles hitting the wall of the container, these guys, buy making all particles attracting each other more often than repelling, virtually created negative pressure, resulting, in principle, in negative temperature. What I want to know is, what exactly do they mean by "tinkering with the interactions between atoms until they attracted each other more than they repelled each other."
Comment icon #25 Posted by DieChecker on 2 July, 2013, 1:30
That is probably propriatary knowledge that someone is going to have to Pay to find out. Probably that information will make it into the public sector in a couple years.
Comment icon #26 Posted by sepulchrave on 2 July, 2013, 4:08
I don't think the knowledge is proprietary. The actual paper on this research lists most of the details. They ``tinker'' with it by adjusting the frequency, pulse width, etc. of the optical lattice in relation to the temperature of the ensemble.
Comment icon #27 Posted by DieChecker on 2 July, 2013, 4:10
How do lasers effectively trap particles? Are the lasers used to actually adjust the magnetic fields they are using, or something like that? Edit: Should have read the links first... The actual paper optical lattice The resulting periodic potential may trap neutral atoms via the Stark shift. Atoms are cooled and congregate in the locations of potential minima. So apparently the lasers push around the atoms, till some are trapped in the wavelength pockets? Interesting.... I have barely enough understanding of physics to have an idea how this works...


Please Login or Register to post a comment.


  On the forums
Forum posts:
Forum topics:
Members:

5855443
264553
165107

 
60% of primate species are facing extinction
1-18-2017
A worrying new study has shown just how vulnerable many of the world's primate species actually are.
CIA uploads millions of declassified files
1-18-2017
The documents cover everything from UFO sightings to government-backed remote viewing experiments.
Curiosity discovers metallic meteorite on Mars
1-18-2017
The rover has come across what scientists believe to be an iron-nickel meteorite on the Martian surface.
New video reveals Huygens' harrowing descent
1-17-2017
NASA has released a new video recreating the Huygens probe's historic touchdown on Saturn's moon Titan.
Other news in this category
French Polynesia signs 'floating city' deal
Posted 1-17-2017 | 4 comments
The world's first ever floating city could soon begin construction off the French Polynesian coast....
 
Can your fingerprints be stolen from a photo?
Posted 1-14-2017 | 4 comments
Researchers in Japan have warned that it is now much easier for thieves to acquire your fingerprints....
 
Spectacular light pillars appear over Canada
Posted 1-13-2017 | 10 comments
An unusual natural phenomenon was spotted over Ontario a week ago by YouTuber Timmy Joe Elzinga....
 
Scientists turn mice in to zombie killers
Posted 1-13-2017 | 12 comments
The mind-controlled rodents could be commanded to hunt down and kill a target using simple light flashes....
 
Female Jia Jia android impresses in Shanghai
Posted 1-12-2017 | 12 comments
An eerily realistic robot designed to emulate a human woman has been turning heads this week in China....
 
Ultra strong, lightweight material developed
Posted 1-10-2017 | 8 comments
A team of researchers at MIT have designed a new super-strong and lightweight 3D form of graphene....
 
Scientists find way to regrow decayed teeth
Posted 1-9-2017 | 20 comments
Fillings could soon become a thing of the past thanks to a drug that can regrow and repair cavities....
 
Huge chunk of Antarctic ice shelf set to break
Posted 1-7-2017 | 30 comments
A worryingly large rift in one of the Antarctic's biggest ice shelves has been continuing to grow....
 
Zombies could wipe out humanity in 100 days
Posted 1-6-2017 | 28 comments
A new study has suggested that it would not take long for a zombie apocalypse to wipe out mankind....
 
UK military is now developing laser weapons
Posted 1-5-2017 | 12 comments
A new Ministry of Defence project is aiming to test out the benefits of 'directed energy' technology....
 
New breathalyzer can identify 17 diseases
Posted 1-4-2017 | 5 comments
Researchers have developed a new device capable of identifying a whole host of different conditions....
 

 View: More news in this category
 
Top   |  Home   |   Forum   |   News   |   Image Gallery   |  Columns   |   Encyclopedia   |   Videos   |   Polls
UM-X 10.7 Unexplained-Mysteries.com © 2001-2017
Privacy Policy and Disclaimer   |   Cookies   |   Advertise   |   Contact   |   Help/FAQ