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Genuine tripartite entanglement and geometric quantum discord in entangled three-body Unruh–DeWitt detector system

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Abstract

We studied the quantum correlations of a three-body Unruh–DeWitt detector system using genuine tripartite entanglement (GTE) and geometric quantum discord (GQD). We considered two representative three-body initial entangled states, namely the GHZ state and the W state. We demonstrated that the quantum correlations of the tripartite system are completely destroyed at the limit of infinite acceleration. In particular, it is found that the GQD of the two initial states exhibits “sudden change” behavior with increasing acceleration. It is shown that the quantum correlations of the W state are more sensitive than those of the GHZ state under the effect of Unruh thermal noise. The GQD is a more robust quantum resource than the GTE, and we can achieve robustness in discord-type quantum correlations by selecting the smaller energy gap in the detector. These findings provide guidance for selecting appropriate quantum states and resources for quantum information processing tasks in a relativistic setting.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 12122504 and 12374408) and the Natural Science Foundation of Hunan Province (Grant No. 2023JJ30384).

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Authors and Affiliations

  1. Department of Physics, and Collaborative Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha, 410081, China

    Tingting Fan, Cuihong Wen, Jiliang Jing & Jieci Wang

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  1. Tingting Fan
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Correspondence to Jieci Wang.

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Fan, T., Wen, C., Jing, J. et al. Genuine tripartite entanglement and geometric quantum discord in entangled three-body Unruh–DeWitt detector system. Front. Phys. 19, 54201 (2024). https://doi.org/10.1007/s11467-024-1398-3

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