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On quantum capacity of erasure channel assisted by back classical communication

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arxiv 0710.5943 v4 pith:SNDVVVY2 submitted 2007-10-31 quant-ph

On quantum capacity of erasure channel assisted by back classical communication

classification quant-ph
keywords communicationclassicalassistedchannelcapacityerasurebackwardbound
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We present a communication protocol for the erasure channel assisted by backward classical communication, which achieves a significantly better rate than the best prior result. In addition, we prove an upper bound for the capacity of the channel. The upper bound is smaller than the capacity of the erasure channel when it is assisted by two-way classical communication. Thus, we prove the separation between quantum capacities assisted by backward classical communication and two-way classical communication.

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