Quantum Gas Temperature Drops Below Absolute Zero

Physicists have created a quantum gas capable of reaching temperatures below absolute zero, paving the way for future quantum inventions.

The chilly substance was composed of potassium atoms which were held in a lattice arrangement using a combination of lasers and magnetic fields. According to a news report in the journal Nature, by tweaking the magnetic fields the research team were able to force the atoms to attract rather than repel one another and reveal the sub-absolute zero properties of the gas.

read more: http://www.wired.com/wiredscience/2013/01/below-absolute-zero/