Two-quanta processes in coupled double-quantum-dot cavity systems
arXiv:2501.05967 · doi:10.1140/epjp/s13360-025-07150-x
Abstract
The quantum dynamics of a compound sample consisting from a semiconductor double quantum dot (DQD) system non-linearly coupled with a leaking single-mode micro-resonator is theoretically investigated. The focus is on the resonance condition when the transition frequency of the double quantum dot equals to the doubled resonator frequency, respectively, and the resulting interplay among the involved phonon or photon channels. As a result, the steady-state quantum dynamics of this complex non-linear system exhibits a variety of possible effects that have been demonstrated here. Particularly, we have found the relationship among the electrical current through the double quantum dot and the microwave field inside the resonator that is nonlinearly coupled to it, with a corresponding emphasizing on their critical behaviors. Additionally, the quantum correlations of the photon flux generated into the resonator mode vary from super-Poissonian to Poissonian photon statistics, leading to single-qubit lasing phenomena at microwave frequencies.
10 pages, 3 figures
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