Detecting single infrared photons with 93% system efficiency
Francesco Marsili,Varun B. Verma,Jeffrey A. Stern,Sean D. Harrington,Adriana E. Lita,Thomas Gerrits,Igor Vayshenker,Burm Baek,M. D. Shaw,Richard P. Mirin,Sae Woo Nam +10 more
TLDR
In this article, a fiber-coupled single-photon detection system using amorphous tungsten silicide superconducting nanowire detectors was developed, and the system detection efficiency was higher than 90% in the wavelength range between 1520 nm and 1610 nm.Abstract:
Researchers develop a fiber-coupled single-photon-detection system using amorphous tungsten silicide superconducting nanowire single-photon detectors. The system detection efficiency is higher than 90% in the wavelength range between 1520 nm and 1610 nm. The device dark-count rate, timing jitter and reset time are 1 cps, 150 ps and 40 ns, respectively.read more
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Photon Efficiency Limits in the Presence of Background Noise
TL;DR: In this paper, the authors identify theoretical limits on the photon information efficiency (PIE) of a deep-space optical communication link constrained by the average signal power and operated in the presence of background noise.
Proceedings ArticleDOI
Bridging the gap between theory and practice in quantum cryptography
Marcos Curty,Kiyoshi Tamaki,Feihu Xu,Akihiro Mizutani,Charles Ci Wen Lim,Bing Qi,Hoi-Kwong Lo +6 more
TL;DR: Two potential approaches that, combined, could bring quantum key distribution closer to being a suitable technology for achieving information-theoretic secure communications are reviewed: measurement-device-independent QKD and the loss-tolerantQKD protocol.
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Fluorescence Correlation Spectroscopy with Visible-Wavelength Superconducting Nanowire Single-Photon Detector
Taro Yamashita,Shigehito Miki,Tokuko Haraguchi,Johtaro Yamamoto,Masataka Kinjo,Hirotaka Terai,Yasushi Hiraoka +6 more
TL;DR: In this article, a fluorescence correlation spectroscopy (FCS) system using superconducting nanowire single-photon detectors (SSPDs) is presented.
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Saturated photon detection efficiency in NbN superconducting photon detectors
Ryan P. Murphy,Matthew E. Grein,Theodore Gudmundsen,Adam N. McCaughan,Faraz Najafi,Karl K. Berggren,Francesco Marsili,Eric A. Dauler +7 more
TL;DR: In this paper, the authors demonstrate saturated photon detection efficiency with narrow NbN nanowires and SNAPs to boost the signal-to-noise ratio, and demonstrate a stabilizing choke inductance that is part of the optically active area.
Journal ArticleDOI
Optical scheme for simulating post-quantum nonlocality distillation.
TL;DR: This scheme provides a possible tool for the experimental study on the nonlocality in post-quantum regime and the exact physical principle precisely distinguishing physically realizable correlations from nonphysical ones.
References
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TL;DR: A number of physical systems, spanning much of modern physics, are being developed for this task, ranging from single particles of light to superconducting circuits, and it is not yet clear which, if any, will ultimately prove successful as discussed by the authors.
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Picosecond superconducting single-photon optical detector
Gregory Goltsman,O. Okunev,G. M. Chulkova,A. Lipatov,A. D. Semenov,Konstantin Smirnov,B. M. Voronov,A. Dzardanov,C. Williams,Roman Sobolewski +9 more
TL;DR: In this article, a supercurrent-assisted hotspot-formation mechanism for ultrafast detection and counting of visible and infrared photons is presented, where a photon-induced hotspot leads to a temporary formation of a resistive barrier across the superconducting sensor strip and results in an easily measurable voltage pulse.
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Quantum Communication
Nicolas Gisin,Rob Thew +1 more
TL;DR: The current state of research and future directions in quantum key distribution and quantum networks are reviewed in this paper, with a special emphasis on quantum key distributions and quantum key sharing in quantum networks.
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Invited review article: Single-photon sources and detectors
TL;DR: The current status of single-photon-source and single-Photon-detector technologies operating at wavelengths from the ultraviolet to the infrared are reviewed and applications of these technologies to quantum communication are discussed.