For questions about the quantum discord, a form of nonclassicality due to the possibly non-accessible nature of the quantum mutual information.
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Does computing the quantum mutual information $I(\rho^{AB})$ require full tomographic information of $\rho^{AB}$?Does quantum mutual information encompass information only about quantum correlations, or does it encompass both classical and quantum correlations?
Why is the quantum discord of $\rho$ zero iff $\rho=\sum_j p_j \pi_j\otimes \rho_j$ for mutually orthogonal projections $\pi_j$?
Can separable states have quantum mutual information larger than one?
Local operation to change the maximally mixed 2 qubit state to $\frac{1}{2}(|01\rangle \langle01|+|10\rangle \langle10|)$?
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