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Quantum Optics...wave amplitude question 
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#1
Dec610, 05:42 PM

P: 225

In quantum optics, I've been looking at how one can show electromagnetic field is equivalent to a harmonic oscillator.
They give the E field as, in one dimension: E_x (x,t) = A . cos(wt) . sin(kz) where the symbols have their usual meanings. A is given as SQRT[2w^2 / Ve] here, w is omega, V volume of cavity, e is permittivity of free space. I cannot find an answer however to where this amplitude A comes from. In two quantum optics books I have looked at, they simply introduce it without explanation. Any help?? 


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