论文标题
两级混合器中多光子散射的时间动力学
Time dynamics of multi-photon scattering in a two-level mixer
论文作者
论文摘要
波导中的超导量子量子表现为点状非线性元件。如果用几乎谐振的微波脉冲受到辐照，则量子位会经历量子演化，并由于弹性散射而在边带频率下产生连贯的场。该效果称为量子波混合（QWM），并且出现的侧面成分的数量取决于相互作用的光子的数量。通过驱动具有交替载体频率的短脉冲的超导量子量子，我们通过改变施加脉冲的数量和持续时间来控制与两级系统同时与两级系统相互作用的最大光子数量。增加脉冲数量导致非线性顺序的连续增长，这表现在散射辐射频谱中出现的其他相干侧峰，而整个光谱则保持其不对称性。
A superconducting qubit in a waveguide behaves as a point-like nonlinear element. If irradiated with nearly resonant microwave pulses, the qubit undergoes quantum evolution and generates coherent fields at sideband frequencies due to elastic scattering. This effect is called Quantum Wave Mixing (QWM), and the number of emerged side components depends on the number of interacting photons. By driving a superconducting qubit with short pulses with alternating carrier frequencies, we control the maximal number of photons simultaneously interacting with a two-level system by varying the number and duration of applied pulses. Increasing the number of pulses results in consecutive growth of the order of non-linearity, which manifests in additional coherent side peaks appearing in the spectrum of scattered radiation while the whole spectrum maintains its asymmetry.
