SCIENCE - Quantum temperature: Scientists study the physics that connects the classical to the quantum world

How does a classical temperature form in the quantum world? Scientists have now directly observed the emergence and the spreading of a temperature in a quantum system. Remarkably, the quantum properties are lost, even though the quantum system is completely isolated and not connected to the outside world ...

http://www.sciencedaily.com/releases/2013/09/130909092835.ht