In 2001, when I was doing Quantum Mechanics course here at Stony Brook we studied about Glauber states, a fundamental contribution by Roy Glauber, that describe the behavior of photons, also popularly known as light. I picked up the original Phys Rev Lett. and the Phys. Rev. paper and went through it to basically understand the implications. I couldn't understand lot of it (still couldn't). Later lots of progress was dependent on this fundamental contribution and finally today Glauber received the fabled early early morning call from Sweden. He has been awarded half of the Nobel Prize for Physics for the year 2005.
The other half is jointly awarded to John L. Hall & Theodor W. Hänsch for their contribution to precision measurement and a technique called optical-comb frequency.
More about this later when have a few more details of this.