Optimal quantum source coding with quantum side information at the encoder and decoder
IEEE Transactions on Information Theory
A father protocol for quantum broadcast channels
IEEE Transactions on Information Theory
Nonlocal quantum information in bipartite quantum error correction
Quantum Information Processing
Entanglement-assisted communication of classical and quantum information
IEEE Transactions on Information Theory
Trading classical communication, quantum communication, and entanglement in quantum Shannon theory
IEEE Transactions on Information Theory
Sequential, successive, and simultaneous decoders for entanglement-assisted classical communication
Quantum Information Processing
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In this paper, we consider quantum channels with two senders and one receiver. For an arbitrary such channel, we give multiletter characterizations of two different two-dimensional capacity regions. The first region comprises the rates at which it is possible for one sender to send classical information, while the other sends quantum information. The second region consists of the rates at which each sender can send quantum information. For each region, we give an example of a channel for which the corresponding region has a single-letter description. One of our examples relies on a new result proved here, perhaps of independent interest, stating that the coherent information over any degradable channel is concave in the input density operator. We conclude with connections to other work and a discussion on generalizations where each user simultaneously sends classical and quantum information.