AI 中文总结
研究手性波导量子电动力学介导的非线性光学，通过全波函数计算等方法，揭示跨导量子比特耦合后透射光非相干成分性质，表明其主要源于双光子过程，波导与局部驱动相互作用可调控透射场量子统计，使\(g^{(2)}(0)\)可调。
AI 中文摘要
近年来，手性量子光学作为一个活跃的研究领域出现，因其在量子信息处理和非线性光学方面的应用前景广阔。我们展示了与波导手性耦合的跨导量子比特（transmons）后透射光非相干成分的性质。一个手性跨导量子比特的著名共振荧光类似于非线性量子光学，能将具有空间广泛相干性和泊松分布光子的相干光转换为具有空间局域相干性和聚束光子统计的场。然而，在本文理想化情况下，另一个手性跨导量子比特能消除第一个的影响，与拉比频率无关。全波函数计算表明，在弱驱动极限下，这种非相干光主要来自双光子过程，一个手性跨导量子比特将两个独立光子转换为具有相反动量偏移的光子对。除了通过波导驱动，具有独立可调幅度和相位的局部驱动可分别作用于每个跨导量子比特。波导驱动和局部驱动之间的相互作用调节非相干透射的贡献，从而实现对透射场量子统计的调控，可调的二阶关联函数\(g^{(2)}(0)\)跨越反聚束、相干和强聚束区域。
英文摘要
In recent years, chiral quantum optics has emerged as an active research area due to the promising applications in quantum information processing as well as nonlinear optics. We present results on the properties of the incoherent component of the transmitted light after transmons chirally coupled to a waveguide. The well-known resonance fluorescence of one chiral transmon resembles nonlinear quantum optics as it can convert the coherent light, with photons having spatially extensive coherence and Poisson distribution, into a field with spatially localized coherence and bunching photon statistics. However, another chiral transmon can undo the effect of the first transmon regardless of the Rabi frequency under the idealization involved in this work. A full wavefunction calculation shows that, in the weak driving limit, this incoherent light mainly comes from two-photon processes - one chiral transmon converts two independent photons into a photon pair with opposite momentum shift. In addition to the driving through the waveguide, a local driving with independently tunable amplitude and phase can address each transmon individually. The interplay between the waveguide driving and local driving modulates the contribution of the incoherent transmission and hence enables the engineering of the quantum statistics of the transmitted field, with tunable $g^{(2)}(0)$ spanning anti-bunched, coherent, and strongly bunched regimes.
