- #1
trosten
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Let P be a density matrix. Then the von neumann entropy is defined as
S(P) = -tr(P*log(P))
But how is log(P) defined ?
--edit--
found the answer. the trace is independent of representation so that if P is diagonalized with eigenvalues {k} then S(P) = H({k}) where H is the shannon entropy.
S(P) = -tr(P*log(P))
But how is log(P) defined ?
--edit--
found the answer. the trace is independent of representation so that if P is diagonalized with eigenvalues {k} then S(P) = H({k}) where H is the shannon entropy.
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