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Jun 12, 2019 at 19:52 comment added Sean E. Lake The polarization of a wave is set by a linear combination of the $\mathbf{\epsilon}_r$, right? The index $r$ lives in helicity space, and the vector components of each $\mathbf{\epsilon}$ live in physical/polarization space. In other words, you assume this to be the case when you use $\mathbf{\epsilon}_r$. @SRS
Jun 12, 2019 at 19:17 comment added SRS "It can be shown that there is a unique one to one mapping between the choice of spin basis and the polarization state basis. " Can you show this or suggest a reference? @SeanE.Lake
Dec 29, 2017 at 13:35 history undeleted Sean E. Lake
Dec 29, 2017 at 12:23 history deleted Sean E. Lake via Vote
Dec 29, 2017 at 7:07 history answered Sean E. Lake CC BY-SA 3.0