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

Abstract:

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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