Non-Markovianity of colored noisy channels

Claudia Benedetti, Matteo G A Paris, Sabrina Maniscalco

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We address the non-Markovian character of quantum maps describing the interaction of a qubit with a random classical field. In particular, we evaluate trace- and capacity-based non-Markovianity measures for two relevant classes of environments showing non-Gaussian fluctuations, described respectively by random telegraph noise and colored noise with spectra of the the form 1/fα. We analyze the dynamics of both the trace distance and the quantum capacity, and show that the behavior of non-Markovianity based on both measures is qualitatively similar. Our results show that environments with a spectrum that contains a relevant low-frequency contribution are generally non-Markovian. We also find that the non-Markovianity of colored environments decreases when the number of fluctuators realizing the environment increases.

Original languageEnglish
Article number012114
JournalPhysical Review A
Issue number1
Publication statusPublished - 16 Jan 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Benedetti, C., Paris, M. G. A., & Maniscalco, S. (2014). Non-Markovianity of colored noisy channels. Physical Review A, 89(1), [012114].