A new type of cooling relies on exotic quantum mechanical properties rather than placing objects in a cold environment like a refrigerator. And it may one day help cool objects to lower temperatures than we've ever reached.
How cold or warm an object is depends on how its constituent atoms are shaking, and more and faster shaking corresponds to more heat and higher temperatures. Therefore, making an object colder requires finding a way to slow down the wobbling of its atoms.
Source: www.newscientist.com