Abstract
AbstractWe discuss phonon-induced non-Markovian and Markovian features in QD-based quantum nanooptics. We cover lineshapes in linear absorption experiments, phonon-induced incoherence in the Heitler regime, and memory correlations in two-photon coherences. To qualitatively and quantitatively understand the underlying physics, we present several theoretical models that capture the non-Markovian properties of the electron–phonon interaction accurately in different regimes. Examples are the Heisenberg equation of motion approach, the polaron master equation, and Liouville propagator techniques in the independent boson limit and beyond via the path integral method. Phenomenological modeling overestimates typically the dephasing due to the finite memory kernel of phonons and we give instructive examples of phonon-mediated coherence such as phonon-dressed anticrossings in Mollow physics, robust quantum state preparation, cavity feeding, and the stabilization of the collapse and revival phenomenon in the strong coupling limit of cavity quantum electrodynamics.
Highlights
Since the seminal demonstration of optically [1] and electrically triggered [2] single-photon emission, deterministicA major phonon coupling mechanism stems from the surrounding host material and its lattice vibrations [8, 30, 31]
As an example for signatures typically not present in Lindblad (Markovian) master equation simulations, we present in detail damped Rabi oscillations via longitudinal acoustic phonons
Electron–phonon interaction is a prominent coupling mechanism, and several examples have been given in which the phonon dynamics cannot be reduced to a Lindblad type of interaction
Summary
Since the seminal demonstration of optically [1] and electrically triggered [2] single-photon emission, deterministic. A specific example of a vanishing correlation time is the radiative decay into free space, where the vacuum field amplitude is nearly constant in the regime of optical system–reservoir interaction and justifies within the smallbandwidth assumption a Lindblad formulation of the process as shown in standard quantum optics books [35,36,37,38]. The study of signatures of spatially correlated noise and nonsecular effects [72] has been performed, the read-out of Rabi oscillations in QDs [73], exciton coherence at room temperature [74] investigated, systematic study of dephasing processes including quadratic electron–phonon coupling for elevated temperatures [75, 76] and phonon sidebands in transition metal dichalcogenides have been demonstrated [77]. These models are, not limited to the QD case and are used for other material platforms such as quantum wells, quantum wires, or atomic-thin two-dimensional systems as well [61, 78, 79]
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