Dense coding capacity of a quantum channel

Riccardo Laurenza; Cosmo Lupo; Seth Lloyd; Stefano Pirandola

doi:10.1103/PhysRevResearch.2.023023

Dense coding capacity of a quantum channel

Riccardo Laurenza, Cosmo Lupo, Seth Lloyd, Stefano Pirandola

Computer Science

Research output: Contribution to journal › Article › peer-review

Abstract

We consider the fundamental protocol of dense coding of classical information assuming that noise affects both the forward and backward communication lines between Alice and Bob. Assuming that this noise is described by the same quantum channel, we define its dense coding capacity by optimizing over all adaptive strategies that Alice can implement, while Bob encodes the information by means of Pauli operators. Exploiting techniques of channel simulation and protocol stretching, we are able to establish the dense coding capacity of Pauli channels in arbitrary finite dimension, with simple formulas for depolarizing and dephasing qubit channels.

Original language	English
Article number	023023
Journal	Physical Review Research
Volume	2
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevResearch.2.023023
Publication status	Published - 9 Apr 2020

Bibliographical note

© 2020, Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Access to Document

10.1103/PhysRevResearch.2.023023

PhysRevResearch.2.023023
© 2020, Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Final published version, 430 KBLicence: CC BY

https://arxiv.org/abs/1903.09168

Cite this

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