Teleportation is necessary for faithful quantum state transfer through noisy channels of maximal rank
- 29 July 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 82 (1)
- https://doi.org/10.1103/physreva.82.012334
Abstract
Quantum teleportation enables deterministic and faithful transmission of quantum states, provided a maximally entangled state is preshared between sender and receiver, and a one-way classical channel is available. Here, we prove that these resources are not only sufficient, but also necessary, for deterministically and faithfully sending quantum states through any fixed noisy channel of maximal rank, when a single use of the cannel is admitted. In other words, for this family of channels, there are no other protocols, based on different (and possibly cheaper) sets of resources, capable of replacing quantum teleportation.Keywords
Other Versions
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