On contraction coefficients, partial orders and approximation of capacities for quantum channels

The data processing inequality is the most basic requirement for any meaningful measure of information. It essentially states that distinguishability measures between states decrease if we apply a quantum channel and is the centerpiece of many results in information theory. Moreover, it justifies th...

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Bibliographic Details
Main Authors: Christoph Hirche, Cambyse Rouzé, Daniel Stilck França
Format: Article
Language:English
Published: Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften 2022-11-01
Series:Quantum
Online Access:https://quantum-journal.org/papers/q-2022-11-28-862/pdf/