How can we interpret the components of a polarization four-vector?

Asked Sep 19 '19 at 10:34

Active Sep 28 '19 at 13:22

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The four components of a Dirac spinor can be interpreted in terms of left-chiral and right-chiral spin up and spin down states.

How can we interpret the four components of a polarization four vector $\epsilon_\mu$? In particular, the spin operators for the spin-1 representation are $3\times 3$ matrices and therefore, the corresponding spinors that can be interpreted directly are 3-component vectors.

edited Sep 26 '19 at 14:07

asked Sep 19 '19 at 10:34

jak

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my answer to this question https://physics.stackexchange.com/questions/273621/what-are-the-actual-transformation-properties-of-dirac-spinors-u-sigmap/289046#289046 explains in detail the polarizations for any spin, including thus case of a spin-1 in a 4-vector rep. – TwoBs Sep 29 '19 at 18:52

How can we interpret the components of a polarization four-vector?

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