1302.2984 (Dong Pyo Chi et al.)

Generalized Entropy and Global Quantum Discord in Multi-party Quantum
systems    [PDF]

Dong Pyo Chi, Jeong San Kim, Kyungjin Lee

Using Tsallis-q entropy, we introduce the generalized concept of global quantum discord, namely the q-global quantum discord, and provide its analytic evaluation for two classes of multi-qubit states. We also provide a sufficient condition, for which the pairwise quantum correlations in terms of q-global quantum discord is monogamous in multi-party quantum systems.

View original: http://arxiv.org/abs/1302.2984