Relating Quantum Privacy and Quantum Coherence: An Operational Approach
- 19 August 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 93 (8) , 080501
- https://doi.org/10.1103/physrevlett.93.080501
Abstract
Given many realizations of a state or a channel as a resource, two parties can generate a secret key as well as entanglement. We describe protocols to perform the secret key distillation (as it turns out, with optimal rate). Then we show how to achieve optimal entanglement generation rates by “coherent” implementation of a class of secret key agreement protocols, proving the long-conjectured “hashing inequality.”Keywords
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