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arXiv · 1310.2812

de Bruijn-type identity for systems with flux

Takuya Yamano
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Abstract

We show that an information-theoretic relation called the de Bruijn-type identity can be reformulated in a physical context with probability currents. The time derivatives of relative entropies under the continuity equation are presented, which shows that the conservation of distance between a pair of distributions is generally not guaranteed. As an important implication of these results, we discuss and present a possible conceptual framework for the classical no-cloning (deleting) theorem and qualitatively assert that we can attribute the perfect performance of the operating machine to the openness (non-vanishing flow at boundaries between the processing machine and the system) during the process.

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Takuya Yamano. 2013-10-10. de Bruijn-type identity for systems with flux. https://doi.org/10.1140/epjb%2Fe2013-40634-9

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