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Towards a covariant formulation of electromagnetic wave polarization

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Chapter 5<br />

Covariant <strong>polarization</strong><br />

tensors in E,B-component<br />

form<br />

In Chapter 5 we saw that the S, V, T parameters can be found in Lorentz <strong>covariant</strong><br />

tensors. These tensors were constructed according to<br />

where<br />

is the metric,<br />

and<br />

1 X µν = F αµ (F αδ ) ∗ g δν , (5.1)<br />

2 X µν = F αµ (F αδ ) ∗ g δν , (5.2)<br />

3 X µν = F αµ (F αδ ) ∗ g δν , (5.3)<br />

4 X µν = F αµ (F αδ ) ∗ g δν , (5.4)<br />

⎛<br />

⎞<br />

1 0 0 0<br />

g µν = g µν = ⎜0 −1 0 0<br />

⎟<br />

⎝0 0 −1 0 ⎠ , (5.5)<br />

0 0 0 −1<br />

⎛<br />

⎞<br />

0 −E 1 −E 2 −E3<br />

F µν = ⎜E 1 0 −cB 3 cB 2<br />

⎟<br />

⎝E 2 cB 3 0 −cB 1<br />

⎠ (5.6)<br />

E 3 −cB 2 cB 1 0<br />

⎛<br />

⎞<br />

0 E 1 E 2 E 3<br />

F µν = ⎜−E 1 0 −cB 3 cB 2<br />

⎟<br />

⎝−E 2 cB 3 0 −cB 1<br />

⎠ (5.7)<br />

−E 3 −cB 2 cB 1 0<br />

are the contravariant and <strong>covariant</strong> field strength tensors, respectively, and<br />

⎛<br />

⎞<br />

0 −cB 1 −cB 2 −cB 3<br />

F µν = ⎜cB 1 0 E 3 −E 2<br />

⎟<br />

⎝cB 2 −E 3 0 E 1<br />

⎠ (5.8)<br />

cB 3 E 2 −E 1 0<br />

39

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