Hi Eckard,
I hesitate to comment on Mark Newstead's essay, which I have read but not studied. Rather than try to translate his answer to you [Aug 23, 2012 @14:13] I would rather address the difference in an EM wave and the C-field wave that I postulate is the basis of the QM wave function.
I view a 'single' EM wave as a pure sine wave of 'infinite' extent. The scaled linear superposition of such components is of course the basis of Fourier analysis.
The key physical basis of such EM waves is their ability to propagate (through a medium or vacuum) far from the source of the radiation. In contrast, the wave that I describe is a circulating field (according to the weak field approximation to GR) induced by a 'mass current density' which has units of momentum density, mv where m is mass density and v is velocity. This wave is best viewed as a 'vortex' which has one field component, C, (versus two, E and B for EM waves) and does not propagate away from the source but travels *with* the source, soliton-like. There is no 'infinite' aspect to this wave but it does decay over a finite distance. Without the finite range of the 'trailing vortex' (analogous to aircraft wingtip vortices) the wave would not extend over the range of excited orbits and there would be no interference leading to quantized stable orbits.
You provided a link, http://en.wikipedia.org/wiki/Circular_polarization, to an article discussing circular polarization, that contains a nice animation showing a circularly polarized E-field wave. Note that this wave propagates far from the source, unlike the C-field wave and note also that the E-field is a radially directed field from the axis of propagation, whereas I picture the C-field wave as circular (or cylindrical) circulating about the axis of propagation, and centered on the inducing source current density. This is a quite different physical phenomenon.
As for the 'left-handed nature' of this wave, the GR equation is curl C = -p where p is the momentum density. I interpret the minus sign to indicate left-handed circulation. This is compatible with many left-handed aspects of particle physics, from neutrino to boson, and even shows up in biological molecules. The implications are too many to discuss in a comment, but I find them significant.
Finally, you say "You seem to add some temporal and spatial restriction which is entirely unknown to me". You are correct. I have combined de Broglie's wavelength-momentum relation p = h/lambda with the GR equation curl C ~ p to obtain: lambda (dot) curl C = h, where h is Planck's constant. This is interpreted as a quantized 'volume' and I show how an atomic orbit can be viewed as an integer multiple of such volumes. This is a new physical relation that has never been proposed before and probably takes some digestion from people who seem to think that everything is already known about quantum mechanics, and that we should just take their word and "shut up and calculate". In addition, I believe that there are other implications, based on a geometric algebra approach, which I hope to develop further in the future.
I hope that this comment has answered some of your question.
Best,
Edwin Eugene Klingman