Why Semiclassical Electrodynamics is not Gauge Invariant
It is shown that in semiclassical electrodynamics, which describes how electrically charged particles move according to the laws of quantum mechanics under the influence of a prescribed classical electromagnetic field, only a restricted class of gauge transformations is allowed. This lack of full gauge invariance, in contrast to the situation in classical and quantum electrodynamics which are fully gauge-invariant theories, is due to the requirement that the scalar potential in the Hamiltonian...[Show more]
|Collections||ANU Research Publications|
|Source:||Journal of Physics A: Mathematical and General|
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