Asymmetric information capacities of reciprocal pairs of quantum channels

  title={Asymmetric information capacities of reciprocal pairs of quantum channels},
  author={Matteo Rosati and Vittorio Giovannetti},
  journal={Physical Review A},
Reciprocal pairs of quantum channels are defined as completely positive transformations which admit a rigid, distance-preserving, yet not completely-positive transformation that allows to reproduce the outcome of one from the corresponding outcome of the other. From a classical perspective these transmission lines should exhibit the same communication efficiency. This is no longer the case in the quantum setting: explicit asymmetric behaviours are reported studying the classical communication… Expand
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