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Information encoding of a qubit into a multilevel environment.

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Information encoding of a qubit into a multilevel environment.

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Pérez Cañellas, Armando

Aquest document és un/a article, creat/da en: 2010

Este documento está disponible también en : 10.1103/PhysRevA.81.052326

I consider the interaction of a small quantum system (a qubit) with a structured environment consisting of many levels. The qubit will experience a decoherence process, which implies that part of its initial information will be encoded into correlations between system and environment. I investigate how this information is distributed on a given subset of levels as a function of its size, using the mutual information between both entities, in the spirit of the partial-information plots studied by Zurek and co-workers. In this case we can observe some differences, which arise from the fact that I am partitioning just one quantum system and not a collection of them. However, some similar features, like redundancy (in the sense that a given amount of information is shared by many subsets), which increases with the size of the environment, are also found here.

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