Pankratov Andrey L, Spagnolo Bernardo
Institute for Physics of Microstructures of RAS, GSP-105, Nizhny Novgorod 603950, Russia.
Phys Rev Lett. 2004 Oct 22;93(17):177001. doi: 10.1103/PhysRevLett.93.177001. Epub 2004 Oct 18.
The influence of fluctuations and periodical driving on temporal characteristics of short overdamped Josephson junctions is analyzed. We obtain the standard deviation of the switching time in the presence of a dichotomous driving force for arbitrary noise intensity and in the frequency range of practical interest. For sinusoidal driving the resonant activation effect has been observed. The mean switching time and its standard deviation have a minimum as a function of driving frequency. As a consequence the optimization of the system for fast operation will simultaneously lead to the minimization of timing errors.
分析了涨落和周期性驱动对短过阻尼约瑟夫森结时间特性的影响。我们得到了在存在二分驱动力的情况下，对于任意噪声强度以及在实际感兴趣的频率范围内开关时间的标准差。对于正弦驱动，观察到了共振激活效应。平均开关时间及其标准差作为驱动频率的函数存在最小值。因此，为实现快速操作而对系统进行优化将同时导致定时误差最小化。
