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High Fidelity Symmetric Telecloning and Entanglement Distribution of Spin Quantum States by Weak Measurement and Reversal

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Abstract

We propose a physical realization of robust symmetric telecloning scheme for spin quantum states by employing the weak measurement and reversal (WMR) operation. Using proper WMR, the ultrahigh telecloning fidelity and long distance of quantum state transfer with certain success probability can be achieved. More interestingly, the lowest average telecloning fidelity can attain 80 %, which is almost independent of the spin chain length. We also study the properties of entanglement distribution via the spin chain for arbitrary two-qubit entangled pure states as inputs and find that the WMR operation indeed helps for protecting distributed entanglement.

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Acknowledgments

This work is financially supported by the National Natural Science Foundation of China (Grants No. 61475045, and No. 61505053), the Natural Science Foundation of Hunan Province, China (Grants No. 2016JJ3015, No. 2015JJ3092 and No. 2015JJ6006), the Research Foundation of Education Bureau of Hunan Province, China (Grant No. 15C0937), and the School Foundation from the Hunan University of Arts and Science (Grants No. 14YB01 and No. 14ZD01).

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Authors and Affiliations

  1. College of Physics and Electronics, Hunan University of Arts and Science, Changde, 415000, China

    Qiong Wang, Zhi He & Chun-Mei Yao

  2. Department of Junior Education, Changsha Normal University, Changsha, 410100, China

    Qiong Wang & Wen-Juan Li

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  1. Qiong Wang
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  2. Zhi He
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  4. Wen-Juan Li
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Correspondence to Qiong Wang.

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Wang, Q., He, Z., Yao, CM. et al. High Fidelity Symmetric Telecloning and Entanglement Distribution of Spin Quantum States by Weak Measurement and Reversal. Int J Theor Phys 55, 3737–3745 (2016). https://doi.org/10.1007/s10773-016-3002-2

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  • DOI: https://doi.org/10.1007/s10773-016-3002-2

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