Computation-Aided Classical-Quantum Multiple Access to Boost Network Communication Speeds

A multiple access channel (MAC) consists of senders simultaneously transmitting their messages to a single receiver. For the classical-quantum case (CQ MAC), achievable rates are known assuming that all decoded, common assumption in quantum network design. However, such conventional design approach ignores global structure, i.e., topology. When CQ MAC is given as part communication, this work shows computation properties can be used boost communication speeds with code dependent on We quantify codes property for two-sender MAC. boson coherent binary discrete modulation, we show it achieves maximum possible rate (the single-user capacity), which cannot achieved Further, by different detection methods: (with and without memory), on-off photon counting, homodyne (each at power). Finally, describe two practical applications, one cryptographic.