Answer by Adam Zalcman for How would I compute a density matrix of a complex...
Let $\rho$ denote the density matrix specified in the question. The probability of obtaining the result corresponding to $|0\rangle$ when measuring $\rho$ in the computational basis is$$p(0|\rho) =...
View ArticleHow would I compute a density matrix of a complex qubit mixed state?
I am currently reading Nielsen & Chuang, and one of the questions asks to calculate a density matrix with the following mixed state,$$\frac{1}{9}\begin{bmatrix}5 & 1 & −i \\1 & 2 &...
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