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: This work extends the security of TF-QKD to the finite-key regime, showing that it can overcome the fundamental bounds on point-to-point QKD with ~10 10 transmitted signals.
Journal ArticleDOI
Proposal for Quantum Simulation via All-Optically-Generated Tensor Network States.
Ish Dhand,M. Engelkemeier,Linda Sansoni,Sonja Barkhofen,Christine Silberhorn,Martin B. Plenio +5 more
TL;DR: In this paper, a nonlinear down-conversion process in an optical loop is employed to generate one-and higher-dimensional tensor network states of light, which are then used to simulate the ground-state physics of many-body systems.
Journal ArticleDOI
Determining the depairing current in superconducting nanowire single-photon detectors
Simone Frasca,Boris Korzh,Marco Colangelo,Di Zhu,Adriana E. Lita,Jason P. Allmaras,Emma E. Wollman,Varun B. Verma,Andrew E. Dane,Edward Ramirez,Andrew D. Beyer,Sae Woo Nam,A. G. Kozorezov,M. D. Shaw,Karl K. Berggren +14 more
TL;DR: In this paper, the depairing current of superconducting nanowire single photon detectors (SNSPDs) is estimated by measuring the resonance frequency of resonator style nanowires coplanar waveguides both in transmission and reflection configurations.
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Optically probing the detection mechanism in a molybdenum silicide superconducting nanowire single-photon detector
Misael Caloz,Boris Korzh,Nuala Timoney,Markus Weiss,Stefano Gariglio,Richard J. Warburton,Christian Schönenberger,Jelmer J. Renema,Hugo Zbinden,Félix Bussières +9 more
TL;DR: In this paper, the authors investigated the detection mechanism in a meandered molybdenum silicide superconducting nanowire single-photon detector by characterising the detection probability as a function of bias current in the wavelength range of 750-2050 nm.
Journal ArticleDOI
Hotspot relaxation time of NbN superconducting nanowire single-photon detectors on various substrates.
Lu Zhang,Lixing You,Xiaoyan Yang,JunJie Wu,Chaolin Lv,Qi Guo,Weijun Zhang,Hao Li,Wei Peng,Zhen Wang,Xiaoming Xie +10 more
TL;DR: The τth strongly increased with increasing bias current in the two-photon detection regime and the minimum hotspot relaxation time (τth)min was not significantly affected by the bath temperature; this is different from the previous observations reported for WSi SNSPDs.
References
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Quantum Computing
Thaddeus D. Ladd,Fedor Jelezko,Raymond Laflamme,Yasunobu Nakamura,Christopher Monroe,Jeremy L. O'Brien +5 more
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.