What means 'coherence' in quantum mechanics?

[go quantum!]

I have nothing to add to the question that opens this post.

 

[torquil]

http://en.wikipedia.org/wiki/Quantum_coherence#Quantum_coherence_and_the_range_limitation_problem"

 

[juliobw]

It means cooperative dancing of quanta. Living systems use it to do work efficiently.