Quantum discord of X-states as optimization of one variable function
Naihuan Jing, Bing Yu
TL;DR
This paper provides a complete analytical solution for quantum discord in two-qubit X-states by optimizing a single-variable function, covering various parametric regions and including iterative methods for exceptional cases.
Contribution
It introduces a comprehensive method to compute quantum discord for X-states through one-variable optimization and addresses exceptional solutions with an iterative algorithm.
Findings
Exact quantum discord solutions for multiple parametric regions.
Identification of exceptional solutions via iterative algorithm.
Complete analytical framework for quantum discord in X-states.
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.
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