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
Citations
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Tight finite-key security for twin-field quantum key distribution
TL;DR: In this paper, the security of TF-QKD protocol was extended to the finite-key regime, where users exchange an infinite number of signals, and it was shown that it can overcome the fundamental bounds on point-to-point QKD with ~1010 transmitted signals.
Journal ArticleDOI
Device-independent Randomness Expansion with Entangled Photons
Lynden K. Shalm,Lynden K. Shalm,Yanbao Zhang,Joshua C. Bienfang,Collin Schlager,Martin J. Stevens,Michael D. Mazurek,Michael D. Mazurek,Carlos Abellan,Waldimar Amaya,Morgan W. Mitchell,Morgan W. Mitchell,Mohammad A. Alhejji,Honghao Fu,Joel Ornstein,Richard P. Mirin,Sae Woo Nam,Emanuel Knill,Emanuel Knill +18 more
TL;DR: In this paper, a photonic loophole-free Bell test was used to verify the correctness of the output of a random number generator with a soundness error bounded by $5.7\times 10^{-7}$ in the presence of classical side information.
Journal ArticleDOI
Fast Cascoded Quenching Circuit for Decreasing Afterpulsing Effects in 0.35- $\mu$ m CMOS
TL;DR: In this paper, the authors presented a fully integrated single-photon avalanche diode (SPAD) using a fast cascoded quenching circuit (QC) fabricated in a 0.35-$ CMOS process.
Journal ArticleDOI
Nonbolometric bottleneck in electron-phonon relaxation in ultrathin WSi films
Mariia Sidorova,A. G. Kozorezov,A. V. Semenov,Yu. P. Korneeva,M. Yu. Mikhailov,A. Yu. Devizenko,Alexander Korneev,G. M. Chulkova,Gregory Goltsman +8 more
TL;DR: In this article, the internal phonon bottleneck model was developed to describe the energy exchange between the ultrathin metal film and acoustically rigid substrate, and it was shown that electrons and nonescaping phonons may form a unified subsystem which is cooled down only due to interactions with escaping phonons, either due to direct phonon conversion or indirect sequential interaction with an electronic system.
Journal ArticleDOI
Superconducting nanowire single photon detection system for space applications
Lixing You,Jia Quan,Yong Wang,Y. Ma,Xiaoyan Yang,Yanjie Liu,Hao Li,Jianguo Li,Juan Wang,Jingtao Liang,Zhen Wang,Xiaoming Xie +11 more
TL;DR: This work demonstrates a SNSPD system using a hybrid cryocooler that could ultimately be compatible with space applications and presents a maximum system detection efficiency of over 50% and a timing jitter of 48 ps, which paves the way for various space applications.
References
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Quantum Computing
Thaddeus D. Ladd,Fedor Jelezko,Raymond Laflamme,Yasunobu Nakamura,Christopher Monroe,Jeremy L. O'Brien +5 more
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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.