CH110 Study Guide - Final Guide: Quantum Electrodynamics, Photon
The preceding paragraph suggests that, before
proceeding to the problem of the photon, it is necessary
to revisit the nonstationary states in quantum
mechanics insofar as the stationary states alone are
usually discussed in detail. In this paper it will be
shown that the resulting logical chain that invokes
electromagnetic radiation and resonance phenomena
leads to the conclusions that all effects ascribed to
manifestation of the corpuscular properties of light can
be completely explained on a base of the wave concept
of light alone and therefore there are no photons in
nature. The question as to why quantum
electrodynamics employs the notion of
a photon (and the notion is helpful there) will also be
discussed in the concluding section.
2. Nonstationary states
Let us present first a brief summary of well-known
facts that will be needed for what follows. A special
role in quantum mechanics is ascribed to stationary
states whose energy will be denoted as En and the
corresponding eigenfunctions as ψn(q) where q is a set
of coordinates. We suppose that the system in question
is isolated and the Hamiltonian does not depend on the
time. For the sake of simplicity we assume En to be
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