Dear All(adsbygoogle = window.adsbygoogle || []).push({});

I'd be very grateful if someone could help me out with finding the trace of a product of 4 SL(2,C) matrices, namely:

[tex] \mathrm{Tr} \left[ \sigma^{\alpha} \sigma^{\beta} \sigma^{\gamma} \sigma^{\delta} \right] [/tex]

where:

[tex] \sigma^{\alpha} = (\sigma^0, \sigma^1, \sigma^2, \sigma^3) [/tex]

[tex] \sigma^0 = I_2 [/tex]

I'm hoping this is a bunch of kronecker delta's but I can't seem to derive the correct expression needed for my work.

Regards

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# Trace of Pauli Matrices

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