Question: Prove the statement above, that U = e i y satisfies the requirement (6.9.5). You will need to use the anticommutation rule { i

Prove the statement above, that U = e^iϕσ_y satisfies the requirement (6.9.5). You will need to use the anticommutation rule {σ_i, σ_j} = 2δ_ij and σ^∗_y = −σ_y. ST = TS SUKU = UK(S) SU* = -US** - SU =

ST = TS SUKU = UK(S) SU* = -US** - SU = US. - (6.9.5)

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