Scientists Discover Theoretical Way to Reach Absolute Zero
Within quantum mechanics, there has been an observable limit (the quantum backaction limit) on how low you can cool an object experimentally. Up until very recently, that limit had not been challenged by conventional laser cooling techniques. However, physicists at the National Institute of Standards and Technology (NIST) cooled an object to a temperature below this quantum-limit. Theoretically, the novel technique they used could even cool objects to absolute zero.