Capacity of Quantum Erasure Channel Assisted by Backwards Classical Communication
Author(s)Leung, Debbie W.; Lim, Joungkeun; Shor, Peter W.
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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.
DepartmentMassachusetts Institute of Technology. Department of Mathematics
Physical Review Letters
American Physical Society
Leung, Debbie , Joungkeun Lim, and Peter Shor. “Capacity of Quantum Erasure Channel Assisted by Backwards Classical Communication.” Physical Review Letters 103.24 (2009): 240505. © 2009 The American Physical Society
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