MiS Preprint Repository

We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV ( that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint

Super quantum discord for two-qubit X-type states and the dynamics under nondissipative channels

Tao Li, Teng Ma, Yao-Kun Wang, Shao-Ming Fei and Zhi-Xi Wang


Super quantum discord is a kind of quantum correlations defined in terms of weak measurements for obtaining the maximal classical correlations in a bipartite systems. We derive explicitly the analytical formula for general X-type two-qubit states. The evolution of these states under local and global bit-flip and phase-flip channels are investigated. The relations among the super quantum discord, its evolution and the week measurement strength have been analyzed in detail.


Related publications

2015 Repository Open Access
Tao Li, Teng Ma, Yao-Kun Wang, Shao-Ming Fei and Zhi-Xi Wang

Super quantum discord for x-type states

In: International journal of theoretical physics, 54 (2015) 2, pp. 680-688