研究目的
Investigating the effects of coherent and incoherent inter-dot tunneling on the optical properties of a double quantum dot molecule immersed in a unimodal optical cavity.
研究成果
The research highlights the distinct effects of coherent tunneling and phonon-assisted tunneling on the optical properties of a double quantum dot-cavity system. Phonon-assisted tunneling leads to emission peaks coalescence, indicative of dynamical phase transitions, whereas coherent tunneling causes peak shifts. The study also identifies regions where anti-bunched light can be produced, suggesting potential applications in quantum information technologies.
研究不足
The study assumes a single excitation level in each quantum dot, which may not hold at high electron-phonon coupling strengths. The model neglects pure dephasing and cavity phonon-feeding effects to isolate the tunneling mechanisms.
1：Experimental Design and Method Selection:
The study involves theoretical modeling of a double quantum dot molecule interacting with a single-mode optical cavity, considering both coherent tunneling and phonon-assisted tunneling mechanisms. The dynamics are described using a quantum master equation approach.
2：Sample Selection and Data Sources:
The system parameters are based on estimated values from previous research involving self-assembled InGaAs quantum dots coupled to a cavity mode.
3：List of Experimental Equipment and Materials:
Theoretical study, no specific equipment listed.
4：Experimental Procedures and Operational Workflow:
Numerical calculations are performed to analyze the steady-state properties, photoluminescence spectrum, and second-order coherence function of the system under varying tunneling and phonon-assisted tunneling rates.
5：Data Analysis Methods:
The analysis involves solving the quantum master equation for the steady state, calculating the photoluminescence spectrum using the Wiener-Khintchine theorem, and evaluating the second-order coherence function to assess the quantum nature of emitted light.
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