Fundamental limitations on distillation of quantum channel resources.

ABSTRACT: Quantum channels underlie the dynamics of quantum systems, but in many practical settings it is the channels themselves that require processing. We establish universal limitations on the processing of both quantum states and channels, expressed in the form of no-go theorems and quantitative bounds for the manipulation of general quantum channel resources under the most general transformation protocols. Focusing on the class of distillation tasks - which can be understood either as the purification of noisy channels into unitary ones, or the extraction of state-based resources from channels - we develop fundamental restrictions on the error incurred in such transformations, and comprehensive lower bounds for the overhead of any distillation protocol. In the asymptotic setting, our results y

SUBMITTER: Regula B 

PROVIDER: S-EPMC8292459 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature