论文标题
从经典的悬挂振荡器到Kerr参数振荡器的跨界观察
Spectroscopic observation of the crossover from a classical Duffing oscillator to a Kerr parametric oscillator
论文作者
论文摘要
我们研究了约瑟夫森参数振荡器的微波反应，该振荡器由带有嵌入式DC-Squid的超导传输线谐振器组成。 DC-squid允许在其小于或大于光子损耗率的范围内控制Kerr非线性的大小。光谱测量结果揭示了微波反应从单个设备中的经典行李振荡器变为KERR参数振荡器的变化。在单光子KERR制度中，我们观察到具有$ 0 $或$π$的定义相位的参数振荡，其概率可以通过外部注射的信号来控制。
We study microwave response of a Josephson parametric oscillator consisting of a superconducting transmission-line resonator with an embedded dc-SQUID. The dc-SQUID allows to control the magnitude of a Kerr nonlinearity over the ranges where it is smaller or larger than the photon loss rate. Spectroscopy measurements reveal the change of the microwave response from a classical Duffing oscillator to a Kerr parametric oscillator in a single device. In the single-photon Kerr regime, we observe parametric oscillations with a well-defined phase of either $0$ or $π$, whose probability can be controlled by an externally injected signal.
