Identification over quantum broadcast channels is considered. As opposed to the information transmission task, the decoder only identifies whether a message of his choosing was sent or not. This relaxation allows for a double-exponential code size. An achievable identification region is derived for a quantum broadcast channel, and full characterization for the class of classical-quantum broadcast channels. The results are demonstrated for a depolarizing broadcast channel. Furthermore, the identification capacity region of the single-mode pure-loss bosonic broadcast channel is obtained as a consequence. In contrast to the single-user case, the capacity region for identification can be significantly larger than for transmission.

翻译：与信息传输任务相反,解码器只确定他所选择的信息是否发送。这种放松允许双重耗尽代码大小。为量子广播频道和古典-量子广播频道类别的全面定性,可实现的识别区域;为分解的广播频道展示了结果。此外,单一模式纯损博索尼广播频道的识别能力区域也因此获得。与单一用户的情况相反,识别能力区域可能大大大于传输能力区域。