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超导弱连接在外源作用下,一般能简化为由电流源驱动的电阻分路约瑟夫逊结模型.受到辐射场作用时,其临界电流周期性地被调制,本文将给出其解析解.在上述情况下,对弱连接发生的常电压电流阶跃提供一个一般的判据,并且说明分谐波电流阶跃是不存在的;在调制幅度较大的情况下,给出电流阶跃高度依赖于调制幅度的数值计算结果.
Generally speaking, the superconducting weak connection can be simplified as a resistively shunted Josephson junction model driven by a current source, and its critical current is periodically modulated by the radiation field. In this paper, an analytical solution is given. In the above case, a general criterion for the normal voltage current step with weak connection is provided, and the subharmonic current step does not exist. When the modulation amplitude is large, the current step is given a high degree of dependence Numerical results of modulation amplitude.