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Quantum Discord of Certain Two-Qubit States

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Abstract

Quantum discord is an effective measure of quantum correlation introduced by Olliver and Zurek. We evaluate analytically the quantum discord for a large family of non-X-states. Exact solutions of the quantum discord are obtained for four parametric spaces of non-X-states. Dynamic behavior of the quantum discord is also explored under the action of the Kraus operator.

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Acknowledgments

The corresponding author gratefully acknowledges the partial support of NSFC grants 11426116, 11501251 and 11871325 during this work. The third author is supported by NSFC grant 11531004 and Simons Foundation grant 523868.

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Authors and Affiliations

  1. School of Mathematics and Computer Science, Jianghan University, Wuhan, Hubei, 430056, China

    Jianming Zhou & Xiaoli Hu

  2. Department of Mathematics, North Carolina State University, Raleigh, NC, 27695, USA

    Naihuan Jing

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  1. Jianming Zhou
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  2. Xiaoli Hu
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  3. Naihuan Jing
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Correspondence to Xiaoli Hu.

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Zhou, J., Hu, X. & Jing, N. Quantum Discord of Certain Two-Qubit States. Int J Theor Phys 59, 415–425 (2020). https://doi.org/10.1007/s10773-019-04333-y

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  • DOI: https://doi.org/10.1007/s10773-019-04333-y

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