约瑟夫森结中拉比振荡、拉姆齐条纹和自旋回波的经典模拟
Classical analogs for Rabi-oscillations, Ramsey-fringes, and spin-echo in Josephson junctions
摘要：
我们调查的结果，最近发表的实验的量子行为的约瑟夫森电路的经典模型的基础上的电容和电容分流（RCSJ）结模型。我们的分析表明，在低温和低损耗的脉冲微波驱动的约瑟夫森结的非线性行为和约瑟夫森电路的实验观察报告之间的密切相似的证据。具体来说，我们证明了拉比振荡，拉姆齐条纹，自旋回波观测不是一个独特的量子解释的现象。事实上，它们是经典非线性动力学中锁相瞬态的自然结果，并且当遵循微波应用的实验配方和实验检测方案时，可以在约瑟夫森结的纯经典模型中观察到。因此，我们的结论是，经典的非线性动力学可以有助于理解相关的实验观察约瑟夫森响应各种微波微扰在非常低的温度和低耗散。
英文摘要：
We investigate the results of recently published experiments on the quantum behavior of Josephson circuits in terms of the classical modelling based on the resistively and capacitively-shunted (RCSJ) junction model. Our analysis shows evidence for a close analogy between the nonlinear behavior of a pulsed microwave-driven Josephson junction at low temperature and low dissipation and the experimental observations reported for the Josephson circuits. Specifically, we demonstrate that Rabi-oscillations, Ramsey-fringes, and spin-echo observations are not phenomena with a unique quantum interpretation. In fact, they are natural consequences of transients to phase-locking in classical nonlinear dynamics and can be observed in a purely classical model of a Josephson junction when the experimental recipe for the application of microwaves is followed and the experimental detection scheme followed. We therefore conclude that classical nonlinear dynamics can contribute to the understanding of relevant experimental observations of Josephson response to various microwave perturbations at very low temperature and low dissipation.
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