We consider a non-Hermitian model for studying the quantum dynamics of exciton/plasmon interactions in the presence of dissipation and dephasing. The model can be used as an alternative to the Lindblad density matrix approach and is computationally and conceptually simpler. We find that optical spectra in the linear regime can be adequately described by this approach for both one and two quantum dots interacting with a plasmon. In the case of two quantum dots interacting with a plasmon, the model can also describe time-dependent coherences qualitatively when both dissipation and dephasing are present, and quantitatively in the limit with no dephasing. The model fails, however, in the limit of high intensity pumping of the system. Approaches to refining the model are discussed.

Non-Hermitian approach for quantum-dot/plasmon interactions

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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