Geometric global quantum discord

Jianwei Xu
2012 Journal of Physics A: Mathematical and Theoretical  
Geometric quantum discord, proposed by Dakic, Vedral, and Brukner [Phys. Rev. Lett. 105 (2010) 190502], is an important measure for bipartite correlations. In this paper, we generalize it to multipartite states, we call the generalized version geometric global quantum discord (GGQD). We characterize GGQD in different ways, and provide some special states which allow analytical GGQD.
doi:10.1088/1751-8113/45/40/405304 fatcat:h6gqqqw5gnf63nz3msd3pwvsla