Year: 2004
Type: article
Abstract: We consider the problem of correcting the errors incurred from sending quantum information through a noisy quantum environment by using classical information obtained from a measurement on the environment. For discrete time Markovian evolutions, in the case of fixed measurement on the environment, we give criteria for quantum information to be perfectly corrigible and characterize the related feedback. Then we analyze the case when perfect correction is not possible and, in the qubit case, we find optimal feedback maximizing the channel fidelity.
Source: Journal of Mathematical Physics
DOI: 10.1063/1.1758320
Authors: M. Gregoratti, R. F. Werner
Institutions: Politecnico di Milano, Technische Universität Braunschweig
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2079332113