频率调制双量子点腔系统中的非经典光子统计
Non-classical photon statistics in frequency-modulated double quantum dot cavity systems
浏览论文内容
中文总结 AI 辅助
研究频率调制双量子点腔系统的量子动力学，在特定条件下，通过法诺因子行为等证明输出腔电磁场由单光子通量构成，服从亚泊松量子光子统计，还探讨了声子等对光子量子特性的影响。
中文摘要 AI 辅助
理论上研究了与泄漏微波谐振器模式耦合的双量子点二能级系统的量子动力学。双量子点通过施加连续场驱动，导致每个量子点基态之间的能量分离随时间调制，形成量子比特。当谐振器与量子比特频率之差分别等于调制频率的倍数时，会出现腔共振。在强库仑相互作用极限以及组合系统（即量子比特和单模腔）与相应电子、声子或光子库的弱耦合情况下，证明了输出腔电磁场由服从亚泊松量子光子统计的单光子通量组成。这分别通过法诺因子行为或比较谐振器的二阶和三阶光子关联函数得到证明。还讨论了声子、腔模退相或环境温度对光子量子特性的影响。
英文摘要
The quantum dynamics of a double quantum dot two-level system, coupled to a leaking microwave resonator mode, is theoretically investigated. The double quantum dot is driven by applying a continuous field giving rise to time-dependent modulations of its energy separation between the ground levels of each dot, forming the qubit. Therefore, the cavity resonances occur when the difference between the resonator and the qubit frequencies equals the multiple of the modulation frequency, respectively. In the strong Coulomb interaction limit and the weak couplings of the combined system, i.e. the qubit and the single-mode cavity, to corresponding electronic, phononic or photonic reservoirs, we have demonstrated that the output cavity electromagnetic field is formed of a single-photon flux obeying the sub-Poissonian quantum photon statistics. This was proved via Fano's factor behaviour or by comparing the resonator's second- and third-order photon correlation functions, respectively. The phonon, the cavity mode dephasing or the environmental temperatures influence on the quantum properties of the photons are also discussed.
