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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Enhancement of superconductivity in NbN nanowires by negative electron-beam lithography with positive resist
Ilya Charaev,T. Silbernagel,B. Bachowsky,Artem Kuzmin,Steffen Doerner,Konstantin Ilin,Alexey Semenov,Dimitri Roditchev,D. Yu. Vodolazov,Michael Siegel +9 more
TL;DR: In this paper, a comparative experimental investigation of superconducting NbN nanowires which were prepared by means of positive and negative electron-beam lithography with the same positive tone Poly-methyl-methacrylate (PMMA) resist was performed.
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Sub-shot-noise-limited fiber-optic quantum receiver
TL;DR: In this article, a quantum receiver based on the Kennedy scheme for discrimination between two phase-modulated weak coherent states is presented, which is assembled entirely from standard fiber-optic elements and operates at a conventional telecom wavelength.
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Semihierarchical quantum repeaters based on moderate lifetime quantum memories
TL;DR: In this article, the authors proposed a protocol that uses a semihierarchical structure to improve the entanglement distribution rate while reducing the requirement of memory time to a range of tens of milliseconds.
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Multiuser Time-Energy Entanglement Swapping Based on Dense Wavelength Division Multiplexed and Sum-Frequency Generation.
Yuanhua Li,Yuanhua Li,Yiwen Huang,Tong Xiang,Yi-you Nie,Ming-huang Sang,Luqi Yuan,Xianfeng Chen +7 more
TL;DR: The Letter demonstrates the feasibility of a proposed multiuser network, and hence paves a route toward a variety of quantum applications, including entanglement-swapping-based quantum direct communication.
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Realization of multiplexing of heralded single photon sources using photon number resolving detectors.
TL;DR: The experimental realization of a HSPS combining spatial (or temporal) source multiplexing and photon-pair number discrimination that can suppress the two-photon probability to 44.2 ± 0.7% is reported.
References
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Thaddeus D. Ladd,Fedor Jelezko,Raymond Laflamme,Yasunobu Nakamura,Christopher Monroe,Jeremy L. O'Brien +5 more
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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.