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Bounds for multi-end communication over quantum networks

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Publication details

JournalQuantum Sci. Technol.
DateAccepted/In press - 29 Aug 2019
DatePublished (current) - 24 Sep 2019
Issue number4
Number of pages16
Pages (from-to)1-16
Original languageEnglish


Quantum and private communications are affected by a fundamental limitation which severely restricts the optimal rates that are achievable by two distant parties. To overcome this problem, one needs to introduce quantum repeaters and, more generally, quantum communication networks. Within a quantum network, other problems and features may appear when we move from the basic unicast setting of single-sender/single-receiver to more complex multi-end scenarios, where multiple senders and multiple receivers simultaneously use the network to communicate. Assuming various configurations, including multiple-unicast, multicast, and multiple-multicast communication, we bound the optimal rates for transmitting quantum information, distributing entanglement, or generating secret keys in quantum networks connected by arbitrary quantum channels. These bounds cannot be surpassed by the most general adaptive protocols of quantum network communication.

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© 2019 IOP Publishing Ltd. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.

    Research areas

  • quant-ph, cond-mat.other, math-ph, math.MP, physics.optics

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