Problem 22. Let p1 and p2 be density matrices in the same Hilbert space. The Bures distance between the two density matrices is defined as DB(P1, P2) := V2(1– tr((p}"?p2e}"")"/2)). 1/: Consider the density matrices 1 Pi = 1/2 1/2 0 0 P2 acting in the Hilbert space C². Find the Bures distance.

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