More hereNature.com wrote: It may sound less likely than hell freezing over, but physicists have created an atomic gas with a sub-absolute-zero temperature for the first time1. Their technique opens the door to generating negative-Kelvin materials and new quantum devices, and it could even help to solve a cosmological mystery.
Negative Kelvin?
Forum rules
The global forum rules are found here.
NOTE: posts in this section are not counted towards your total.
The global forum rules are found here.
NOTE: posts in this section are not counted towards your total.
- StarPhoenix
- B.Soc.Sci, M.SocSci [UPCF]
- Posts: 17634
- Joined: 11 Dec 2003, 02:00
- Processor: Core i5 3470
- Motherboard: Gigabyte G1 Sniper Z77
- Graphics card: nVidia GeForce GTX 1060
- Memory: 8Gb DDR3 1600
- Location: East London
- Contact:
Negative Kelvin?
I wasn't certain whether I should post this in the "discussions" forum, as I am no physicist, and therefore do not think that I qualify to discuss the matter on which I am posting. I am therefore present it as news that may be of interest.
"Humankind cannot bear very much reality." T.S. Elliot
-
- Registered User
- Posts: 4754
- Joined: 06 Aug 2003, 02:00
- Processor: PHENOM II 945
- Motherboard: Asus M4A78
- Graphics card: HIS ICEQ 4850 1GB
- Memory: 4GB CORSAIR XMS II 1066
- Location: , location, location!
Re: Negative Kelvin?
Go home physics, you are drunk...
o/t There is a science vs science fiction thread. I think this might be better suited to that thread.
o/t There is a science vs science fiction thread. I think this might be better suited to that thread.
"Every normal man must be tempted at times to spit on his hands, hoist that black flag, and begin slitting throats."
- H. L. Mancken
- H. L. Mancken
- hamin_aus
- Forum Moderator
- Posts: 18363
- Joined: 28 Aug 2003, 02:00
- Processor: Intel i7 3770K
- Motherboard: GA-Z77X-UP4 TH
- Graphics card: Galax GTX1080
- Memory: 32GB G.Skill Ripjaws
- Location: Where beer does flow and men chunder
- Contact:
Re: Negative Kelvin?
And here I was thinking StarPheonix was the only thing lower than absolute zero that I know of
- Ron2K
- Forum Technical Administrator
- Posts: 9050
- Joined: 04 Jul 2006, 16:45
- Location: Upper Hutt, New Zealand
- Contact:
Re: Negative Kelvin?
Actually, there is still nothing lower than absolute zero.hamin_aus wrote:And here I was thinking StarPheonix was the only thing lower than absolute zero that I know of
Negative temperature on the kelvin scale is not colder than absolute zero; rather, the system's thermodynamic temperature can be of a negative quantity on the kelvin scale, and such a system is hotter than any system with a positive temperature in the sense that if negative-temperature and positive-temperature systems come in contact, heat flows from the negative to the positive system.
Here's why: temperature is defined as the relationship between energy and entropy. Most systems familiar to us cannot achieve a negative temperature because adding energy always increases their entropy; however, some systems (such as the one linked in the original post) have a maximum amount of energy that they can hold, and the system's entropy actually decreases as the energy limit is approached, and consequently the system's temperature becomes negative even though more energy is added. This is only attainable in quasi-equilibrium systems though, and is a strictly quantum phenomenon.
The negative temperature article on Wikipedia is surprisingly well-written (though it could be sourced better) for those interested in continued reading.
Kia kaha, Kia māia, Kia manawanui.
- StarPhoenix
- B.Soc.Sci, M.SocSci [UPCF]
- Posts: 17634
- Joined: 11 Dec 2003, 02:00
- Processor: Core i5 3470
- Motherboard: Gigabyte G1 Sniper Z77
- Graphics card: nVidia GeForce GTX 1060
- Memory: 8Gb DDR3 1600
- Location: East London
- Contact:
Re: Negative Kelvin?
Huggles.hamin_aus wrote:And here I was thinking StarPheonix was the only thing lower than absolute zero that I know of
Remind me to buy you a drink when I visit Australia.
"Humankind cannot bear very much reality." T.S. Elliot
-
- Registered Pervert
- Posts: 6879
- Joined: 30 Jul 2004, 02:00
- Processor: Intel i7 4790k
- Motherboard: MSI Z97 Gaming 7
- Graphics card: MSI GTX780Ti Gaming
- Memory: G.Skill Sniper 1866mhz 16GB
- Location: The Greater Unknown
- Contact:
Re: Negative Kelvin?
For some odd reason the dragonball z power level thing comes into effect. Something like 1 = 1 punch, 9000 = 2 punches and over 9000 (billions) = 2 1/2 punches.
- Ron2K
- Forum Technical Administrator
- Posts: 9050
- Joined: 04 Jul 2006, 16:45
- Location: Upper Hutt, New Zealand
- Contact:
Re: Negative Kelvin?
Here's a more comprehensive explanation of negative temperature, with the intended audience being people of lesser intelligence (read: every idiot on this forum).
Kia kaha, Kia māia, Kia manawanui.
- Tribble
- Registered User
- Posts: 88465
- Joined: 08 Feb 2007, 02:00
- Processor: Intel Core i7-4770K CPU@3.50GHz
- Motherboard: ACPI x64-based PC
- Graphics card: GeForce GTX 780 Ti
- Memory: 16GB
- Location: Not here
- Contact:
Re: Negative Kelvin?
Oh that is brilliant! I really enjoyed that. I am the right kind of idiot for that article.
- hamin_aus
- Forum Moderator
- Posts: 18363
- Joined: 28 Aug 2003, 02:00
- Processor: Intel i7 3770K
- Motherboard: GA-Z77X-UP4 TH
- Graphics card: Galax GTX1080
- Memory: 32GB G.Skill Ripjaws
- Location: Where beer does flow and men chunder
- Contact:
Re: Negative Kelvin?
TL;DR - I'm here to troll, not learn!Ron2K wrote:Here's a more comprehensive explanation of negative temperature
- Tribble
- Registered User
- Posts: 88465
- Joined: 08 Feb 2007, 02:00
- Processor: Intel Core i7-4770K CPU@3.50GHz
- Motherboard: ACPI x64-based PC
- Graphics card: GeForce GTX 780 Ti
- Memory: 16GB
- Location: Not here
- Contact:
Re: Negative Kelvin?
But Jammy - you missed the best part. Making those dots fly around when you heat them is just the best - and when you add gravity into the mix - why it is positively orgasmic. You have no idea what you just missed!
-
- Registered Pervert
- Posts: 6879
- Joined: 30 Jul 2004, 02:00
- Processor: Intel i7 4790k
- Motherboard: MSI Z97 Gaming 7
- Graphics card: MSI GTX780Ti Gaming
- Memory: G.Skill Sniper 1866mhz 16GB
- Location: The Greater Unknown
- Contact:
Re: Negative Kelvin?
Oh?Tribble wrote:...why it is positively orgasmic. You have no idea what you just missed!
- Tribble
- Registered User
- Posts: 88465
- Joined: 08 Feb 2007, 02:00
- Processor: Intel Core i7-4770K CPU@3.50GHz
- Motherboard: ACPI x64-based PC
- Graphics card: GeForce GTX 780 Ti
- Memory: 16GB
- Location: Not here
- Contact:
Re: Negative Kelvin?
Yes?