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Information gain and systems entanglement in tripartite measurement model

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Abstract

It is well known that obtaining information of the quantum system can be performed by quantum measurements. However, it also brings disturbance to the system and affects the entanglement between arbitrary bipartite systems. Firstly, based on the introduction of the purification system, the measurement process has been modeled as the tripartite systems. Then, the definitions of various information quantities are provided. Finally, we discuss the relationships between information gain and entanglement in the tripartite systems.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 11671284), Sichuan Science and Technology Program (Grant No. 2020YFG0290).

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Authors and Affiliations

  1. School of Mathematical Sciences, Sichuan Normal University, Chengdu, 610066, China

    Wen-jing Li, Liang Tang, Qun Zhang & Ming-qiang Bai

  2. Institute of Intelligent Information and Quantum Information, Sichuan Normal University, Chengdu, 610066, China

    Wen-jing Li, Liang Tang, Qun Zhang & Ming-qiang Bai

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  1. Wen-jing Li
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  2. Liang Tang
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  4. Ming-qiang Bai
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Correspondence to Ming-qiang Bai.

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Li, Wj., Tang, L., Zhang, Q. et al. Information gain and systems entanglement in tripartite measurement model. Quantum Inf Process 20, 38 (2021). https://doi.org/10.1007/s11128-020-02979-w

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