Prove the statement above, that U = e i y satisfies the requirement (6.9.5). You will
Question:
Prove the statement above, that U = eiϕσy satisfies the requirement (6.9.5). You will need to use the anticommutation rule {σi, σj} = 2δij and σ∗y = −σy.
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S₁T = TS₁ SUKU = UK(S¡¥) S₁U* = -US** - ⇒ S₁U = US. - (6.9.5)
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