Bo Li, Lin Chen, Heng Fan
We provide a few equivalent conditions on zero super quantum discord by using quantum discord, classical correlation and mutual information induced by weak measurement. As an application, we investigate the super discord in optimal case of the protocol of state discrimination assisted by an auxiliary system. It is shown that the super discord always exists while one side quantum discord and entanglement is not presented in the optimal case. This result expands the present knowledge of quantum correlation as a resource in quantum information processing and super discord can be regarded as a candidate for correlation needed in assisted state discrimination scheme.
View original:
http://arxiv.org/abs/1301.7500
No comments:
Post a Comment