The classical limit of quantum optics: not what it seems at first sight

The classical limit of quantum optics: not what it seems at first sight

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What light Gift Card is and how to describe it has always been a central subject in physics.As our understanding has increased, so have our theories changed: geometrical optics, wave optics and quantum optics are increasingly sophisticated descriptions, each referring to a larger class of phenomena than its predecessor.But how exactly are these theories related? How and when wave optics reduces to geometric optics is a rather simple problem.Similarly, how Hair Removal quantum optics reduces to wave optics has also been considered to be a very simple business.It is not so.

As we show here the classical limit of quantum optics is a far more complicated issue; it is in fact dramatically more involved and it requires a complete revision of all our intuitions.The revised intuitions can then serve as a guide to finding novel quantum effects.