Tuesday, May 7, 2024
Contact    |    RSS icon Twitter icon Facebook icon  
Unexplained Mysteries
You are viewing: Home > News > Science & Technology > News story
Welcome Guest ( Login or Register )  
All ▾
Search Submit

Science & Technology

Atoms reach record low temperature

By T.K. Randall
January 7, 2013 · Comment icon 27 comments

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."[!gad]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. But now researchers show they can achieve even lower temperatures for a strange realm of "negative temperatures. "


Source: Live Science | Comments (27)




Other news and articles
Recent comments on this story
Comment icon #18 Posted by sepulchrave 11 years ago
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 11 years ago
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 11 years ago
wtf this was my damn link
Comment icon #21 Posted by B Randomly 11 years ago
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 11 years ago
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 11 years ago
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 11 years ago
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 11 years ago
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 11 years ago
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 11 years ago
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.


Our new book is out now!
Book cover

The Unexplained Mysteries
Book of Weird News

 AVAILABLE NOW 

Take a walk on the weird side with this compilation of some of the weirdest stories ever to grace the pages of a newspaper.

Click here to learn more

We need your help!
Patreon logo

Support us on Patreon

 BONUS CONTENT 

For less than the cost of a cup of coffee, you can gain access to a wide range of exclusive perks including our popular 'Lost Ghost Stories' series.

Click here to learn more

Top 10 trending mysteries
Recent news and articles