Optical signatures of non-Markovian behavior in open quantum systems

Dara McCutcheon

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    Abstract

    We derive an extension to the quantum regression theorem which facilitates the calculation of two-time correlation functions and emission spectra for systems undergoing non-Markovian evolution. The derivation exploits projection operator techniques, with which we obtain explicit equations of motion for the correlation functions, making only a second-order expansion in the system-environment coupling strength and invoking the Born approximation at a fixed initial time. The results are used to investigate a driven semiconductor quantum dot coupled to an acoustic phonon bath, where we find the non-Markovian nature of the dynamics has observable signatures in the form of phonon sidebands in the resonance fluorescence emission spectrum. Furthermore, we use recently developed non-Markovianity measures to demonstrate an associated flow of information from the phonon bath back into the quantum dot exciton system.
    Original languageEnglish
    Article number022119
    JournalPhysical Review A
    Volume93
    Issue number2
    Number of pages7
    ISSN2469-9926
    DOIs
    Publication statusPublished - 2016

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