Biomedical subjects
Publications and source records attributed to I Devetak.
We show that three quantum communication protocols--the "feedback father," "fully quantum reverse Shannon," and "fully quantum Slepian-Wolf" protocols--are pairwise related by three different dualities-the resource-reversal, time-reversal, and source-channel dualities.
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."
An outer bound on the low-entanglement remote state preparation ebits vs bits tradeoff curve [Bennett et al., quant-ph/0006044, 2000] is found using techniques of classical information theory. We show this bound to be optimal among an important class of protocols and conjecture optimality even without this restriction.