Solid-state emitter embedded in a microcavity under intense excitation: A variational master-equation approach

Gómez-Sánchez, Oscar J.; Ramírez, Hanz Y.

doi:10.1103/physreva.98.053846

Cited by 6 publications

(9 citation statements)

References 57 publications

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“…Specifically, a reappearance of Rabi oscillations was observed when the laser driving strength exceeds the phonon cutoff frequency [48]. These findings were later supported by intuitive and accurate perturbation theories based on a variational polaron transformation [37,49] that led to a deeper understanding of the system, and it has further been shown that such variational strategies could be combined with coupling to a quantized cavity mode [50]. Inspired by these approaches, we now proceed to develop a variational polaron theory for our system with a quantized cavity mode and use this theory to interpret our numerical results.…”

Section: Electron-phonon Decoupling Regimementioning

confidence: 72%

Optical signatures of electron-phonon decoupling due to strong light-matter interactions

2020

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Section: Electron-phonon Decoupling Regimementioning

confidence: 72%

Optical signatures of electron-phonon decoupling due to strong light-matter interactions

2020

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“…Figure 3(d) compares the emission spectra obtained from the weak-coupling, the single-phonon, and the full-polaron models, at 15 K and at 60 K. There, overestimation of the thermal effects calculated under the weak-coupling model is evidenced [38]. Meanwhile, the very similar features observed in the spectra simulated within the single-phonon and the polaron models reveal that the former is accurate enough for describing the thermal influence in the studied temperature scope.…”

Section: Resultsmentioning

confidence: 96%

“…In theĤ L−M part, g is the light-matter coupling, andm andâ (n andb) are the number of photons and photon annihilation operators for laser A (B), respectively [23,41,[43][44][45][46]. As for theĤ X −P part, η κ is the exciton-phonon coupling for the phonon mode of frequency ω k , andl k andd k are correspondingly the number of phonons and phonon annihilation operators [38,47,48].…”

Section: Doubly Dressed Two-level Systemmentioning

confidence: 99%

“…In this work, we focus on the monochromatic double dressing of a solid-state two-level system and simulate the thermal effects on its emission spectrum assuming that the emitter is embedded in a phonon reservoir, which is effectively the case for artificial atoms given their inherent many-body nature [35,36]. The results presented here particularly consider a single QD, although the used model could be also applied to other types of photon sources, like localized defects or artificial molecules [37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

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Thermal effects on the resonance fluorescence of doubly dressed artificial atoms

Macías-Pinilla

Ramírez

2020

Phys. Rev. A

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In this work, robustness of controlled density of optical states in doubly driven artificial atoms is studied under phonon dissipation. By using both perturbative and polaron approaches, we investigate the influence of carrier-phonon interactions on the emission properties of a two-level solid-state emitter, simultaneously coupled to two intense distinguishable lasers. Phonon decoherence effects on the main features of the emission spectra are found to be modest up to neon boiling temperatures (∼30 K), as compared with photon generation at the Fourier transform limit obtained in the absence of lattice vibrations (zero temperature). These results show that optical switching and photonic modulation by means of double dressing do not require ultralow temperatures for implementation, thus boosting their potential technological applications.

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“…In this section, we present the underlying unitary transformations and derive the corresponding master equations. The unitary transformations considered are the identity transformation, the standard polaron transformation [38,44,[47][48][49], a variationally optimized polaron transformation [14,[50][51][52][53], and a polariton-polaron transformation. An illustration of the exciton-cavity-phonon system together with the effects of the variational polaron transformation and polariton-polaron transformation can be seen in Fig.…”

Section: Perturbative Master Equationsmentioning

confidence: 99%

Non-Markovian perturbation theories for phonon effects in strong-coupling cavity quantum electrodynamics

2021

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Phonon interactions are inevitable in cavity quantum electrodynamical systems based on solid-state emitters or fluorescent molecules, where vibrations of the lattice or chemical bonds couple to the electronic degrees of freedom. Due to the non-Markovian response of the vibrational environment, it remains a significant theoretical challenge to describe such effects in a computationally efficient manner. This is particularly pronounced when the emitter-cavity coupling is comparable with or larger than the typical phonon energy range, and polariton formation coincides with vibrational dressing of the optical transitions. In this paper, we consider four non-Markovian perturbative master equation approaches to describe such dynamics over a broad range of light-matter coupling strengths and compare them with numerically exact reference calculations using a tensor network. The master equations are derived using different basis transformations, and a perturbative expansion in the transformed basis is subsequently introduced and analyzed. We find that two approaches are particularly successful and robust. The first of these is suggested and developed in this paper and is based on a vibrational dressing of the exciton-cavity polaritons. This enables the description of distinct phonon-polariton sidebands that appear when the polariton splitting exceeds the typical phonon frequency scale in the environment. The second approach is based on a variationally optimized polaronic vibrational dressing of the electronic state. Both of these approaches demonstrate good qualitative and quantitative agreement with reference calculations of the emission spectrum and are numerically robust, even at elevated temperatures, where the thermal phonon population is significant.

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Solid-state emitter embedded in a microcavity under intense excitation: A variational master-equation approach

Cited by 6 publications

References 57 publications

Optical signatures of electron-phonon decoupling due to strong light-matter interactions

Optical signatures of electron-phonon decoupling due to strong light-matter interactions

Thermal effects on the resonance fluorescence of doubly dressed artificial atoms

Non-Markovian perturbation theories for phonon effects in strong-coupling cavity quantum electrodynamics

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