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."
|Translated title of the contribution||Relating quantum privacy and quantum coherence: An operational approach|
|Article number||Art no 080501|
|Journal||Physical Review Letters|
|Publication status||Published - Aug 2004|
Bibliographical notePublisher: American Physical Soc
Other identifier: IDS Number: 848MS