arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1707.05643cond-mat.supr-conphysics.ins-det
收藏

载流超导纳米线光子探测中时间抖动的物理机制

Physical mechanisms of timing jitter in photon detection by current carrying superconducting nanowires

Mariia Sidorova, Alexej Semenov, Heinz-Wilhelm Hubers, Ilya Charaev, Artem Kuzmin, Steffen Doerner, Michael Siegel

摘要:

我们研究了不同弯曲分数的曲折纳米线中光子计数出现的时间抖动。时间抖动是载流超导纳米线中光子吸收和正常畴出现之间随机时间延迟的概率密度,揭示了两种不同的潜在物理场景。在确定性的制度,这是实现在大电流和光子能量,抖动控制的位置相关的检测阈值在曲折的直线部分,并与电流减小。在小的光子能量,抖动增加,其电流依赖性消失。在这种概率制度抖动控制的泊松过程中,磁涡流跳随机跨越导线的弯曲附近的区域。

英文摘要:

We studied timing jitter in the appearance of photon counts in meandering nanowires with different fractional amount of bends. Timing jitter, which is the probability density of the random time delay between photon absorption in current-carrying superconducting nanowire and appearance of the normal domain, reveals two different underlying physical scenarios. In the deterministic regime, which is realized at large currents and photon energies, jitter is controlled by position dependent detection threshold in straight parts of meanders and decreases with the current. At small photon energies, jitter increases and its current dependence disappears. In this probabilistic regime jitter is controlled by Poisson process in that magnetic vortices jump randomly across the wire in areas adjacent to the bends.

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。

↑