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首页> 外文期刊>Physica, C. Superconductivity and its applications >Numerical simulation of the self-pumped long Josephson junction using a modified sine-Gordon model
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Numerical simulation of the self-pumped long Josephson junction using a modified sine-Gordon model

机译:使用改进的Sine-Gordon模型对自抽水长约瑟夫森结的数值模拟

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We have numerically investigated the dynamics of a long Josephson junction (flux-flow oscillator) biased by a DC current in the presence of magnetic field. The study is performed in the frame of the modified sine-Gordon model, which includes the surface losses, RC-load at both FFO ends and the self-pumping effect. In our model the dumping parameter depends both on the spatial coordinate and the amplitude of the AC voltage. In order to find the DC FFO voltage the damping parameter has to be calculated by successive approximations and time integration of the perturbed sine-Gordon equation. The modified model, which accounts for the presence of the superconducting gap, gives better qualitative agreement with experimental results compare to the conventional sine-Gordon model. (c) 2006 Elsevier B.V. All rights reserved.
机译:我们已经对存在磁场的直流电流偏置的长约瑟夫森结(磁通振荡器)的动力学进行了数值研究。该研究是在改进的正弦-戈登模型的框架内进行的,该模型包括表面损耗,FFO两端的RC载荷以及自抽效应。在我们的模型中,倾销参数取决于空间坐标和交流电压的幅度。为了找到直流FFO电压,必须通过逐次逼近和扰动正弦-戈登方程的时间积分来计算阻尼参数。与传统的正弦-戈登模型相比,修改后的模型解决了超导间隙的存在,与实验结果在质量上具有更好的一致性。 (c)2006 Elsevier B.V.保留所有权利。

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