Abstract
Quantum reactions are completely characterized by the absolute magnitudes and phase differences of the complex amplitudes of transitions between the initial state and each of the degenerate final states (channels).
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Notes
- 1.
The Stokes parameters \(P_i\) \((i=1,2,3)\) are defined as in quantum electrodynamics: In the helicity representation, the photon 2 \(\times \) 2 density matrix is of the form \(\left\langle \lambda \left| \rho ^{\gamma }\right| \lambda '\right\rangle = \frac{1}{2}\left[ \delta _{\lambda , \lambda '}(1 + \lambda P_3) + (1 - \delta _{\lambda , \lambda '})(- P_1 + i \lambda P_2) \right] \), where the helicity \(\lambda = +1\) (\(\lambda = -1\)) corresponds to right (left) circularly polarized photons.
- 2.
A short notation for the decay amplitudes in analogy with (4.101) has been used.
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Kleinpoppen, H., Lohmann, B., Grum-Grzhimailo, A. (2013). Complete Experiments in Atomic Photoionization. In: Perfect/Complete Scattering Experiments. Springer Series on Atomic, Optical, and Plasma Physics, vol 75. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40514-3_4
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DOI: https://doi.org/10.1007/978-3-642-40514-3_4
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