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QED: the strange theory of light and matter. Light is made of particles ? 
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#19
Feb2211, 01:41 PM

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P: 1,941

Since the Fourier decomposition of every wave packet is composed of a wide range of frequencies, you get the required superposition. 


#20
Feb2311, 02:58 AM

P: 603

You may be entitled to develop a definition based on your understanding and conception, but others might do so with different qualifications. I'm wondering if it might not necessarily be a step forward to always dispense with a semiclassical perspective. One of the potential problems with your line of thinking as I understand it so far is in dealing with both transverse and longitudinal solutions of the Maxwell equations in dispersive media. Those are well known and studied in the field of Plasma Physics. Naturally the longitudinal solutions are not selfpropagating but do have trajectories that diverge significantly from the transverse solutions. I'd tend to call those "effects of a photon's transit" rather than the photon itself as the energy perturbations are no longer localized. Thanks, by the way, for the lecture notes. I'll try to read them over the next few days. 


#21
Feb2311, 04:11 AM

Sci Advisor
P: 1,941

Hence in case of disagreement or seeming paradox, one must resort to the common basis from which the semiclassical view arises, which is the 1photon state. Five papers  five different conceptions. 


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