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<p>This paper investigates the private classical capacity region of classical–quantum broadcast channel with two legitimate receivers and one eavesdropper. We discuss four communication scenarios with respect to the confidential message transmission and the capability of receivers. We introduce auxiliary messages and use the superposition coding and quantum-typical projectors; this will ensure that the auxiliary rate can protect confidential messages from Eve, and the cumulative rate remain legitimate receivers decoding capacity. On the ground, we obtain the capacity regions for four different situations.</p>

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The private classical capacity region of classical–quantum broadcasting channel with three receivers

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Fangyuan Chen,
  • Xiaomin Liu,
  • Zhengjun Xi

摘要

This paper investigates the private classical capacity region of classical–quantum broadcast channel with two legitimate receivers and one eavesdropper. We discuss four communication scenarios with respect to the confidential message transmission and the capability of receivers. We introduce auxiliary messages and use the superposition coding and quantum-typical projectors; this will ensure that the auxiliary rate can protect confidential messages from Eve, and the cumulative rate remain legitimate receivers decoding capacity. On the ground, we obtain the capacity regions for four different situations.