Kapitza-Dirac Scattering and Its Role in Cosmological Redshift
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A detailed examination of Kapitza--Dirac scattering shows that under the conditions of intergalactic space, the quantized photon--electron interaction produces an optical effect that is observed as a spectral redshift. The interaction transfers photons between light-waves, reducing photon energy with a Doppler-recoil of electrons. Each transfer is a result of stimulated emission, a process that changes the direction of the photons but preserves the wavefronts of all light waves, a necessary condition to avoid blurring of images. These properties make the Stimulated Transfer redshift (STz) distinct from all other redshift mechanisms proposed so far. This report presents an overview of additional properties resulting from Kapitza--Dirac scattering, discusses their implications for testable predictions that differ from those made by \((\Lambda)\)CDM, and outlines the prospects for future studies.
