Quantum discord of X-states as optimization of one variable function
arXiv:1604.00124 · doi:10.1088/1751-8113/49/38/385302
Abstract
We solve the quantum discord completely as an optimization of certain one variable function for arbitrary two qubit X state. Exact solutions of the quantum discord are obtained for several nontrivial regions of the five parametric space for the quantum state. Exceptional solutions are determined via an iterative algorithm.
17 pages. Revised version with New title, and more references are added