A pretty counter-intuitive phenomenon. So were super-conductivity and lasing.
I believe both emission and absorption of radiation can be strongly enhanced in a volume of entangled (coherent) particles - even when it's spatial extent is greater than the radiation wave-length. See: http://arxiv.org/abs/1104.2989 Maybe important in crystals? > http://www.insidescience.org/research/1-2376 > > In the Quantum World, Diamonds Can Communicate With Each Other. > > Oxford physicists using bizarre principle of "entanglement" to cause a > change in a diamond they do not touch. > > Entanglement has been proven before but what makes the Oxford experiment > unique is that concept was demonstrated with substantial solid objects at > room temperature. > > > Previous entanglements of matter involved submicroscopic particles, often > at cold temperatures. > > This experiment employed millimeter-scale diamonds, "not individual atoms, > not gaseous clouds," said Ian Walmsley, professor of experimental physics > at Oxford's Clarendon Laboratory, one of the international team of > researchers. > > > "I think I can safely say no one understands quantum mechanics," the late > physicist Richard Feynman once famously explained. > > > This experiment supports my contention that entanglement, a key mechanism > in the cold fusion process, can be broadcast from one entangled ensemble > to induce entanglement in another ensemble even at high temperatures. >
