| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1862125 | Physics Letters A | 2013 | 5 Pages |
Abstract
Global quantum discord (GQD), proposed by Rulli and Sarandy [C.C. Rulli, M.S. Sarandy, Phys. Rev. A 84 (2011) 042109], is a generalization of quantum discord to multipartite states. In this Letter, we provide an equivalent expression for GQD, and obtain the analytical expressions of GQD for two classes of multi-qubit states. The phenomena of sudden transition and freeze of GQD are also discussed.
► We provide an equivalent expression for global quantum discord. ► We obtain the analytical expressions of global quantum discord for two classes of multi-qubit states. ► The phenomena of sudden transition and freeze of global quantum discord are discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Jianwei Xu,