Is the electron wavelength an observable?
This paper is concerned with a problem often overlooked; it stems from the fact that the electron wave is also influenced by the magnetic vector potential. If one considers this influence, problems arise from the ambiguities in the gauge of the vector potential. They bear on the question of whether the electron wavelength can be considered observable or not. The answer lies, probably, in the definition of measurability.
D004583:Electrons; D008280:Magnetics; D008854:Microscopy, Electron