论文标题
基于BCS理论的约瑟夫森连接的时间域模拟器
Time-domain simulator of Josephson junctions based on the BCS theory
论文作者
论文摘要
我们根据约瑟夫森连接中的库珀对和准粒子的电动力学实现了一个时间域模拟器。该工具基于Bardeen-Cooper-Schrieffer（BCS）理论的Werthamer和Harris形式主义所描述的状态的密度，允许在任何信号波形中分析当前或电压控制的Josephson交界处电路的行为，以在任何信号波动中，在构成绝对温度和绝对温度之间的物理温度下。模拟器可以根据McCumber参数来解释I-V曲线滞后，或者在存在单色微波信号的情况下shapiro和照片辅助步骤。我们使用模拟器来评估基于MGB2的Josephson连接在THZ频率上的行为，并考虑到MGB2的两个各向异性间隙的存在。
We realized a time-domain simulator based on the electrodynamics of Cooper pairs and quasiparticles in Josephson junctions. The tool, based on the charge carriers' densities of states described by the Werthamer and Harris formalisms of Bardeen-Cooper-Schrieffer (BCS) theory, allows to analyze the behavior of current- or voltage-controlled Josephson junction-based circuits for any signal waveform, at a physical temperature comprised between the absolute temperature and the critical temperature. The simulator can account for I-V curve hysteresis depending on the McCumber parameter, or Shapiro and photo-assisted steps in the presence of a monochromatic microwave signal. We used the simulator to assess the behavior of MgB2-based Josephson junctions at THz frequencies by taking into account the presence of the two anisotropic gaps of MgB2.
