Below absolute zero

Temperatures get hotter.

Previously it was thought that zero degrees Kelvin was a slow as things could get but a laboratory in Germany has produced ultra extreme negative temperatures. However instead of being colder/slower, activity becomes very much faster or hotter.

 

what activity?

 

As the temperature approaches absolute zero the number of highly energized particles in a particular space becomes few. As the temperature falls below absolute zero, the number of highly energized particles in the same space becomes much higher in proportion to less energized particles.

Perhaps this is the reason that the universe is speeding up, there is a sort of reverse gravity as in begins to heat up again. It appears temperature may be a loop rather than a bottom to top scale.

 

When I first read this post I thought it was B.S. , but there are some links on this . http://www.nature.com/news/quantum-gas-goes-below-absolute-zero-1.12146 http://www.wired.co.uk/news/archive/2013-01/04/quantum-gas-below-absolute-zero As I remember 0 K is -273.15 C ( H.S. school chem.) Strange things happen when you get close to that temp. desert rat

 

thanks for the link, desert rat

 

my next question was going to be what is absolute zero, and if its absolute how can you go below it? so 273.15 is absolute zero?

 

That blows my fucking mind.

Makes no sense at all, and I love this for that.

 

Mind blowing indeed.

 

Absolute zero is the temperature at which theoretically, atoms stop moving.

The Kelvin temperature scale ends at absolute zero, so colder than zero temperatures are referred to as negative temperatures.

 

But isn't temperature defined on the basis of the movement of atoms? So, negative absolute temperatures don't seem to have any meaning.

 

They may need to re write the laws of phyicis , or just push 0 K down a deg or 2 . It is possible they need to come up with new laws on how the universe works , who knows . desert rat

 

That's one way of defining it (movement of atoms, lattice vibrations in a solid). There are subatomic particle aspects of temperature that need to be defined which are quantum in nature and not quite the same as atom movement in the continuum classical sense where there is a large number of unbounded energy states available. There is something that could be referred to as spin-temperature.

http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/neg_temperature.html

"Can this system ever by realized in the real world, or is it just a fantastic invention of sinister theoretical condensed matter physicists? Atoms always have other degrees of freedom in addition to spin, usually making the total energy of the system unbounded upward due to the translational degrees of freedom that the atom has. Thus, only certain degrees of freedom of a particle can have negative temperature.

It makes sense to define the "spin-temperature" of a collection of atoms, so long as one condition is met: the coupling between the atomic spins and the other degrees of freedom is sufficiently weak, and the coupling between atomic spins sufficiently strong, that the timescale for energy to flow from the spins into other degrees of freedom is very large compared to the timescale for thermalization of the spins among themselves. Then it makes sense to talk about the temperature of the spins separately from the temperature of the atoms as a whole. This condition can easily be met for the case of nuclear spins in a strong external magnetic field.

Nuclear and electron spin systems can be promoted to negative temperatures by suitable radio frequency techniques. Various experiments in the calorimetry of negative temperatures, as well as applications of negative temperature systems as RF amplifiers, etc."

 

Another article that gives an explanation.

http://phys.org/news/2013-01-atoms-negative-absolute-temperature-hottest.html

"This inversion of the population of energy states is not possible in water or any other natural system with moving particles, as the system would need to absorb an infinite amount of energy – an impossible feat! However, if the system possesses an upper bound for the energy of the individual particles, such as the top of the hill for the potential energy in Fig. 1, the situation will be completely different. The researchers around Immanuel Bloch and Ulrich Schneider have now realized a gas of atoms possessing such an upper energy limit in their laboratory, following theoretical proposals by Allard Mosk and Achim Rosch."

 

A news article that describes "negative temperature".

http://arstechnica.com/science/2013/01/scientists-create-negative-temperature-system/

 

The paragraph hear the end of the above news article states that the system isn't really going below absolute zero. 'Negative differential temperature' would be a better description than 'below absolute zero'. It's the slope of the entropy vs. energy curve that is going negative.

From the article:

"It's important to emphasize that this negative temperature isn't some state "below" absolute zero. The atoms in this system still have energy, and the negative temperatures are reached through a sudden transition, rather than by gradually shifting to negative values by going past absolute zero."

 

A crude analogy to the phenomenon of negative temperature is negative electrical resistance.

Resistance is defined as the ratio of voltage to current. Positive resistance occurs when applying a higher voltage to a device causes an increase in current. In a 'negative resistance' regime, lowering the voltage causes an increase in current. The physical resistance itself is still positive but the ratio of the change in voltage to change in current is negative in a particular regime. The phenomenon can occur in semiconductors and can be utilized to create electrical oscillation.

Differential temperature is the ratio of the change in entropy to the change in energy. Like the analogy to resistance, the temperature itself is still above absolute zero but the differential temperature can be negative in a particular regime.

 

Zero point energy will be introduced but not soon ...

It iz a ultimate energy and man iz not ready to access it yet...

 

An analogy featuring the Dalai Lama and Warren Buffett.

http://www.empiricalzeal.com/2013/0...ch-us-about-temperatures-below-absolute-zero/

 

Hi,
Its right in warm environment computer's process become slow but in AC or in cold weather its speed become fast.

 

I wonder what would happen to a person if they were suddenly frozen at that temp?