On quantum capacity of erasure channel assisted by back classical communication

Details On quantum capacity of erasure channel assisted by back classical communication On quantum capacity of erasure channel assisted by back classical communication

2007-10-31

arxiv.org/abs/0710.5943v4

Phys. Rev. Lett. 103, 240505 (2009)

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

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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