Quantum discord under two-side projective measurements
Year: 2011
Type: preprint
Abstract: The original definition of quantum discord of bipartite states was defined under one-side projective measurements, it describes quantum correlation more extensively than entanglement. Dakic, Vedral, and Brukner [Phys. Rev. Lett. \textbf{105}, 190502 (2010)] introduced a geometric measure of quantum discord, and Luo, Fu [Phys. Rev. A \textbf{82}, 034302 (2010)] simplified the expression of it. In this paper we generalize the quantum discord to the case of two-side projective measurements, and also define a geometric measure on it. Further, a simplified expression and a lower bound of this geometric measure are derived and explicit expressions are obtained for some special cases.
Source: arXiv (Cornell University)
Author: Jianwei Xu
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W160956523