Norm-based measurement of quantum correlation
Yu-Chun Wu, Guang‐Can Guo · Physical Review A · 2011
In this paper we derived a necessary and sufficient condition for classical correlated states and proposed a norm-based measurement $Q$ of quantum correlation. Using the max norm of operators, we gave the expression of the quantum correlation measurement $Q$ and investigated the dynamics of $Q$ in Markovian and non-Markovian cases, respectively. $Q$ decays exponentially and vanishes only asymptotically in the Markovian case and causes periodical death and rebirth in the non-Markovian case. In the pure state, the quantum correlation $Q$ is always larger than the entanglement, which was different from other known measurements. In addition, we showed that locally broadcastable and broadcastable are equivalent and reproved the density of quantum correlated states.