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arXiv · 1505.03503

Measuring and using non-markovianity

Carlos Pineda·Thomas Gorin·David Davalos·Diego A. Wisniacki·Ignacio Garcia-Mata
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Abstract

We construct measures for the non-Markovianity of quantum evolution with a physically meaningful interpretation. We first provide a general setting in the framework of channel capacities and propose two families of meaningful quantitative measures, based on the largest revival of a channel capacity, avoiding some drawbacks of other non-Markovianity measures. We relate the proposed measures to the task of information screening. This shows that the non-Markovianity of a quantum process may be used as a resource. Under these considerations, we analyze two paradigmatic examples, a qubit in a quantum environment with classically mixed dynamics and the Jaynes-Cummings model.

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Carlos Pineda, Thomas Gorin, David Davalos, Diego A. Wisniacki, Ignacio Garcia-Mata. 2015-05-13. Measuring and using non-markovianity. https://doi.org/10.1103/physreva.93.022117

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