Teleportation as a Depolarizing Quantum Channel, Relative Entropy and Classical Capacity

Details Teleportation as a Depolarizing Quantum Channel, Relative Entropy and Classical Capacity Teleportation as a Depolarizing Quantum Channel, Relative Entropy and Classical Capacity

2001-07-26

arxiv.org/abs/quant-ph/0107132v2

Phys. Rev. Lett 87, 267901 (2001)

Physics

Quantum Physics

Version published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.87.267901

We show that standard teleportation with an arbitrary mixed state resource is equivalent to a generalized depolarizing channel with probabilities given by the maximally entangled components of the resource. This enables the usage of any quantum channel as a generalized depolarizing channel without additional twirling operations. It also provides a nontrivial upper bound on the entanglement of a class of mixed states. Our result allows a consistent and statistically motivated quantification of teleportation success in terms of the relative entropy and this quantification can be related to a classical capacity.

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