The broadcast classical-quantum capacity region of a two-phase bidirectional relaying channel. (English) Zbl 1327.81081
Summary: We studied a three-node quantum network that enables bidirectional communication between two nodes with a half-duplex relay node for transmitting classical messages. A decode-and-forward protocol is used to perform the communication in two phases. In the first phase, the messages of two nodes are transmitted to the relay node. The capacity of the first phase is well known by previous works. In the second phase, the relay node broadcasts a re-encoded composition to the two nodes. We determine the capacity region of the broadcast phase. To the best of our knowledge, this is the first paper analyzing quantum bidirectional relay networks.
MSC:
| 81P45 | Quantum information, communication, networks (quantum-theoretic aspects) |
| 81P40 | Quantum coherence, entanglement, quantum correlations |
| 94A40 | Channel models (including quantum) in information and communication theory |
| 68M10 | Network design and communication in computer systems |
Keywords:
quantum information theory; quantum network; quantum relay channel; quantum broadcast channelReferences:
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