Minimal Timing Jitter in Superconducting Nanowire Single-Photon Detectors
Denis Yu. Vodolazov · Physical Review Applied · 2019
The results of this theoretical study are important for applications dealing with superconducting nanowire single-photon detectors (SNSPDs), which include quantum information processing. The author shows that the variation in delay time ${\ensuremath{\tau}}_{d}$ (timing jitter) of the voltage response after absorption of a single photon, connected to either position-dependent response or variation in the energy deposited to electrons, could be as small as 1 ps when the current in the superconducting strip approaches the depairing current. Reducing this jitter is a main topic of SNSPD research, and understanding the origins of these variations is necessary to that end.