Journal article ยท Preprint article
Optical signatures of non-Markovian behavior in open quantum systems
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.
Language: | English |
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Year: | 2016 |
ISSN: | 10941622 , 10502947 , 24699926 and 24699934 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevA.93.022119 |