Entanglement distribution over 300 km of fiber
TL;DR: The distribution of time-bin entangled photon pairs over 300 km of optical fiber is reported, confirming the violation of Bell's inequality by 2.9 standard deviations.
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Abstract: We report the distribution of time bin entangled photon pairs over 300 km of optical fiber. We realized this by using a high speed and high signal to noise ratio entanglement generation and evaluation setup that consists of periodically poled lithium niobate waveguides and superconducting single photon detectors. The observed two-photon interference fringes exhibited a visibility of 84 %. We confirmed the violation of Bell's inequality by 2.9 standard deviations.
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Advances in quantum cryptography
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Highly indistinguishable and strongly entangled photons from symmetric GaAs quantum dots
Daniel Huber,Marcus Reindl,Yongheng Huo,Huiying Huang,Johannes S. Wildmann,Oliver G. Schmidt,Armando Rastelli,Rinaldo Trotta +7 more
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High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides.
TL;DR: A thin-film periodically poled lithium niobate waveguide was designed and fabricated which generates entangled photon pairs at telecommunications wavelengths with high coincidences-to-accidentals counts ratio CAR>67000, two-photon interference visibility V>99%, and heralded single-ph photon autocorrelation g_{H}^{(2)}(0)<0.025.
279
Entanglement of two quantum memories via fibers over dozens of kilometres
Yong Yu,Fei Ma,X. G. Luo,Bo Jing,Peng-Fei Sun,Ren-Zhou Fang,C. Yang,Hui Liu,Ming-Yang Zheng,Xiuping Xie,Weijun Zhang,Lixing You,Zhen Wang,Teng-Yun Chen,Qiang Zhang,Xiao-Hui Bao,Jian-Wei Pan +16 more
TL;DR: In this article, the authors used cavity enhancement to create bright atom-photon entanglement, and harness quantum frequency conversion to shift the atomic wavelength to telecom for long-distance communication.
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