Quasi-Superactivation of Classical Capacity of Zero-Capacity Quantum Channels
arXiv:1206.5693 · doi:10.1080/09500340.2012.711491
Abstract
One of the most surprising recent results in quantum Shannon theory is the superactivation of the quantum capacity of a quantum channel. This phenomenon has its roots in the extreme violation of additivity of the channel capacity and enables to reliably transmit quantum information over zero-capacity quantum channels. In this work we demonstrate a similar effect for the classical capacity of a quantum channel which previously was thought to be impossible. We show that a nonzero classical capacity can be achieved for all zero-capacity quantum channels and it only requires the assistance of an elementary photon-atom interaction process - the stimulated emission.
arXiv comment52 pages, 6 figures, Journal-ref: Journal of Modern Optics, published version (minor typo fixed)
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Cited by in corpus (4)
- A Survey on Quantum Channel Capacities
- Algorithmic Superactivation of Asymptotic Quantum Capacity of Zero-Capacity Quantum Channels
- How Deep the Theory of Quantum Communications Goes: Superadditivity, Superactivation and Causal Activation
- Polaractivation of Hidden Private Classical Capacity Region of Quantum Channels