修正热点模型中超导单光子探测器红边界的电流依赖性
Current dependence of the 'red' boundary of superconducting single photon detectors in the modified hot spot model
摘要：
得到了载流超导薄膜中出现电阻态的几率约为1的阈值电流与吸收光子能量之间的关系。在我们的计算中，我们使用修改后的热点模型，它假设不同的抑制强度的超导序参量参数在有限区域的薄膜周围的地方，光子被吸收。为了找到阈值电流，我们求解超导序参量的Ginzburg-Landau方程，该方程自动包含电流连续性方程，并且它允许我们考虑热点附近的电流重新分布对超导态稳定性的反向影响。我们发现定量协议与最近的实验中，我们使用单一的拟合参数，它描述了什么部分的光子的能量去局部破坏的薄膜中的超导性。
英文摘要：
We find the relation between the energy of the absorbed photon and the threshold current at which the resistive state appears in the current-carrying superconducting film with the probability about unity. In our calculations we use the modified hot spot model, which assumes different strength of suppression of the superconducting order parameter in the finite area of the film around the place where the photon is absorbed. To find the threshold current we solve the Ginzburg-Landau equation for superconducting order parameter, which automatically includes the current continuity equation and it allows us to consider the back effect of current redistribution near the hot spot on the stability of the superconducting state. We find quantitative agreement with the recent experiments, where we use the single fitting parameter which describes what part of the energy of the photon goes for the local destruction of the superconductivity in the film.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
