- Working Paper
The data processing inequality (DPI) is a fundamental feature of information theory. Informally it states that you cannot increase the information content of a quantum system by acting on it with a local physical operation. When the smooth min-entropy is used as the relevant information measure, then the DPI follows immediately from the definition of the entropy. The DPI for the von Neumann entropy is then obtained by specializing the DPI for the smooth min-entropy by using the quantum asymptotic equipartition property (QAEP). We provide a new, simplified proof of the QAEP and therefore obtain a self-contained proof of the DPI for the von Neumann entropy. Show more
Journal / seriesarXiv
Pages / Article No.
Organisational unit03781 - Renner, Renato / Renner, Renato
258932 - Generalized (quantum) information theory (EC)
135048 - Information-theoretic methods for physics (SNF)
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