News Column

Reports on Quantum Information Processing Findings from Shaoguan University Provide New Insights

June 24, 2014

By a News Reporter-Staff News Editor at Information Technology Newsweekly -- Fresh data on Quantum Information Processing are presented in a new report. According to news reporting originating in Shaoguan, People's Republic of China, by VerticalNews journalists, research stated, "Werner derivatives are a special kind of mixing states transformed from Werner states by unitary operations (Hiroshima and Ishizaka in Phys Rev A 62:044302, 2000). In this paper, the inherent quantum correlations in Werner derivatives are quantified by two different quantifiers, i.e., quantum discord and geometric discord."

The news reporters obtained a quote from the research from Shaoguan University, "Different analytic expressions of the two discords in Werner derivatives are derived out. Some distinct features of the discords and their underlying physics are exposed via discussions and analyses. Moreover, it is found that the amount of quantum correlations quantified by either quantifier in each derivative cannot exceed that in the original Werner state."

According to the news reporters, the research concluded: "In other words, no unitary operation can increase quantum correlation in a Werner state as far as the two quantifiers are concerned."

For more information on this research see: Analytic expressions of discord and geometric discord in Werner derivatives. Quantum Information Processing, 2014;13(6):1331-1344. Quantum Information Processing can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer -; Quantum Information Processing -

Our news correspondents report that additional information may be obtained by contacting H.J. Tang, Shaoguan Univ, Dept. of Phys, Shaoguan 512005, People's Republic of China. Additional authors for this research include Y.M. Liu, J.L. Chen, B.L. Ye and Z.J. Zhang.

Keywords for this news article include: Asia, Shaoguan, People's Republic of China, Quantum Information Processing

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Source: Information Technology Newsweekly

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