Nonlatching Superconducting Nanowire Single-Photon Detection with Quasi-Constant-Voltage Bias

Liu, Dengkuan; Chen, Sijing; You, Lixing; Wang, Yongliang; Miki, Shigehito; Wang, Zhen; Xie, Xiaoming; Jiang, Mianheng

doi:10.1143/apex.5.125202

Cited by 22 publications

(18 citation statements)

References 18 publications

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“…Other approaches can be used such as inserting a 50 shunt resistor between the DC arm of the bias tee and the ground to prevent the detector latching at high photon count rates. [87]…”

Section: Increasing Maximum Count Rate For Single-photon Detectorsmentioning

confidence: 99%

Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound

2020

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A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances. Previous studies show that the key rate of point-to-point QKD is limited by a secret key rate capacity bound, and higher key rates would require quantum repeaters. In 2018, the seminal twin-field (TF) QKD protocol was proposed to provide a remarkable solution to overcoming the linear secret key capacity bound. This article presents an up-to-date survey on recent developments in this area, including the security proofs of phase-matching QKD and other TF-QKD type protocols, the theoretical examinations of these protocols under realistic conditions, and the recent experimental demonstrations.

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“…Other approaches can be used such as inserting a 50 shunt resistor between the DC arm of the bias tee and the ground to prevent the detector latching at high photon count rates. [87]…”

Section: Increasing Maximum Count Rate For Single-photon Detectorsmentioning

confidence: 99%

Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound

2020

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“…If the absorbed optical energy is insufficient for latching the detector, the temperature of its electronic subsystem decreases and, at some point, the heated nanowire goes from the normal state to a metastable one in which both the superconducting phase and the normal phase of the superconductor co-exist along the length of the nanowire [18]. In this mode, radio frequency generation is observed, which appears in Fig.…”

Section: Latching Thresholdmentioning

confidence: 99%

Countermeasure against bright-light attack on superconducting nanowire single-photon detector in quantum key distribution

et al. 2019

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We present an active anti-latching system for superconducting nanowire single-photon detectors. We experimentally test it against a bright-light attack, previously used to compromise security of quantum key distribution. Although our system detects continuous blinding, the detector is shown to be partially blindable and controllable by specially tailored sequences of bright pulses. Improvements to the countermeasure are suggested.

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“…Figure 1 shows the schematic of the SNSPD system with PNR ability. It has four SNSPDs installed in one G-M cryocooler to realize a four-channel SNSPD system [25,26], and they share the same isolated voltage source. At the same time, four adjustable resistors are used to optimize the bias current for each detector.…”

Section: System Setupmentioning

confidence: 99%

Photon-number resolving and distribution verification using a multichannel superconducting nanowire single-photon detection system

Liu

You

et al. 2014

J. Opt. Soc. Am. B

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resolving (PNR) detection is a prerequisite for many important quantum optics applications. By using a four-channel superconducting nanowire single-photon detection system incorporating the photon multiport network technique, PNR detection of up to four photons was realized. The amplitude of the output pulse is proportional to the detected photon number. Using two channels of the system, the Poisson distribution of photon number in the faint pulsed laser was verified. The theoretical counts of the two-photon response were analyzed as a function of the mean photon number per pulse. The measurement results matched well with the theoretical calculations according to the Poisson distribution.

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Nonlatching Superconducting Nanowire Single-Photon Detection with Quasi-Constant-Voltage Bias

Cited by 22 publications

References 18 publications

Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound

Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound

Countermeasure against bright-light attack on superconducting nanowire single-photon detector in quantum key distribution

Photon-number resolving and distribution verification using a multichannel superconducting nanowire single-photon detection system

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