Return current in hysteretic Josephson junctions: Experimental distribution in the thermal activation regime
Return current in hysteretic Josephson junctions: Experimental distribution in the thermal activation regime
复制标题
迟滞约瑟夫森结中的返回电流：热激活状态下的实验分布
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
P. Carelli
中科院分区：
文献类型：
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作者：
M. Castellano;G. Torrioli;F. Chiarello;C. Cosmelli;P. Carelli
我们提出了一项关于迟滞、高质量约瑟夫森结的重新捕获过程的实验研究；也就是说，我们测量了结点从电压状态切换回零电压状态的值的分布，作为所施加磁场的函数。虽然过去从理论和实验的角度对相反的过程（逃离零电压状态）进行了广泛的研究，但在重新捕获过程的文献中却很少发现。就倾斜洗衣板势而言，该过程对应于势阱中从运行状态到锁定状态的重新捕获。测量的有趣之处在于返回电流的值可以与结中的耗散直接相关。虽然通过 I-V 曲线实验测量的确定性行为似乎与理论预测一致，但即使在很小的细节上，统计行为也强烈......
We present an experimental study on the retrapping process of a hysteretic, high-quality Josephson junction; namely, we have measured the distribution of the values at which the junction switches back from the voltage state to the zero-voltage state, as a function of the applied magnetic field. While the opposite process (escape from the zero-voltage state) has been extensively studied in the past, both from the theoretical and the experimental point of view, little is found in the literature on the retrapping process. In terms of the tilted washboard potential, the process corresponds to the retrapping from the running state to a locked state in a potential well. The interest of the measurements is in the fact that the value of the return current can be directly related to the dissipation in the junction. While the deterministic behavior, experimentally measured through the I–V curve, appears to be in agreement with the theoretical predictions, even in minor details, the statistical behavior is strongly ...