Question

What would happen if we could somehow bring matter below absolute zero?

Answer 1

that's just theoretical.... a single photon would raise the temperature ... the only way it could exist is if you could know about it.

you can however get really, really, really close

Answer 2

Ask yourself this: how do we know what the temperature is? How do we define and measure temperature? Given the answer to those questions, is it even meaningful to talk about temperature below absolute zero?

Answer 3

would that mean that temperature is relative?

Answer 4

sorry i thought ... you said bring the temperature TO absolute zero ... not BELOW

temperature is related to vibration of atoms ... can't have LESS than No Energy(vibrational)

Answer 5

so its impossible??

Answer 6

impossible .
no such thing as below absolute zero.

Answer 7

what if it reaches absolute zero what happens then?

Answer 8

You can't actually reach absolute zero (it would take an infinite number of steps). you can keep getting closer.

try a thought experiment:
Suppose you have reached 1-Kelvin. You have a reliable piece of technology that cuts any temperature to a tenth in one year. So after 1 year, you're at 0.1K. after 2yrs @ 0.01K...

when do you reach 0K?

Answer 9

But as matter gets close to 0K it exhibits weird properties, like Super-Conductivity, Super-Fluidity, and some form a new state of matter called Bose-Einstein Condensate

Answer 10

Please explain those properties!

Answer 11

@JamesJ is it really impossible? I found this article on it: http://www.newscientist.com/article/mg20827893.500-how-to-create-temperatures-below-absolute-zero.html

Answer 12

Fair enough.

Answer 13

IF temperatures reached absolute zero? The particles will have negative entropy and molecules will start to overlap each other? Is this true?