Work

Memory Effects in Quantum Channel Discrimination

Year: 2008

Type: article

Abstract: We consider quantum-memory assisted protocols for discriminating quantum channels. We show that for optimal discrimination of memory channels, memory assisted protocols are needed. This leads to a new notion of distance for channels with memory, based on the general theory of quantum testers. For discrimination and estimation of sets of independent unitary channels, we prove optimality of parallel protocols among all possible architectures.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.101.180501

Authors: Giulio Chiribella, Giacomo M. D’Ariano, Paolo Perinotti

Institutions: University of Pavia, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2140839707

FWCI: 2.346

Cites: 17

Cited by: 183

Related to: 10