InterJournal Complex Systems, 75
Status: Accepted
Manuscript Number: [75]
Submission Date: 963011
Entropy exchange and coherent quantum information
Author(s): Benjamin Schumacher

Subject(s): CX.09

Category: Brief Article


We consider properties of noisy quantum information channels. The effect of these channels on entangled quantum states allows us to define several new quantities of interest, including the entropy exchange between a system and its environment and the coherent information that is conveyed by the channel. The coherent information in a channel can never be increased by quantum data processing. These ideas provide new tools for describing the information dynamics of open quantum systems.

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