Scientists in China Achieve Quantum Key Distribution in Thousand Kilometers of Relay Free Fiber Optics
Hefei, May 29 (Reporter Xu Jing) -- Pan Jianwei and Zhang Qiang of the University of Science and Technology of China, together with Wang Xiangbin of Tsinghua University, Liu Yang of Jinan Institute of Quantum Technology, You Lixing and Zhang Weijun of the Shanghai Institute of Microsystems and Information Technology of the Chinese Academy of Sciences, have cooperated to achieve 1002km point-to-point long-distance quantum key distribution in optical fibers by developing technologies such as low crosstalk phase reference signal control and extremely low noise single photon detectors, Not only has it set a world record for fiber optic relay free quantum key distribution distance, but it also provides a solution for high-speed backbone links in intercity quantum communication. The relevant research results were recently published in the international academic journal "Physical Review Letters"...
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Quantum information released the "Kuafu" quantum computing cloud platform
Beijing Business Daily News (Reporter Yang Yuehan) On May 25th, the 2023 Zhongguancun Forum opened. At the opening ceremony, the quantum information officially released the Quafu (Kuafu) quantum computing cloud platform...
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Phonon Coupling - Electrons in CdSe, CdS Cores, and Shell Quantum Dots
Xu Chenyuan's StudyEditor | Xu Chenyuan's StudyWe found that peak CdS frequency affects excitationStrong dependence on energyBetween the experimental frequency of the CdSe+CdS combination band and the sum of the corresponding fundamental frequencyThere is still a huge differenceThis indicates that the main transition at high excitation energy is limited to the CdSe core or CdS shell, and therefore cannot enhance the binding band transition between the core and shellThe Raman intensity ratio of CdS to CdSe further supports this viewpoint. The Phonon of CdSeLO in the Lowest Exciton TransitionElectron phonon coupling is slightly weaker in core/shell structures than in pure CdSe quantum dotsThis is contrary to the expectation of the Frehlich coupling mechanism...
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Hengtong Optoelectronics: CPO+F5G concept+quantum technology+wind power+6G concept+charging station+chip
*Disclaimer: Any content and views involved in this article are for reference only, and do not constitute investment suggestions or basis. Investment needs to be made independently and bear risks...
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Experimental technology reveals the quantum properties of Astatine element, an artificially synthesized element
Could you please click on 'Follow' to facilitate your discussion and sharing, as well as bring you a different sense of participation? Thank you for your support!Literature | History Charging StationEditor | Cultural and Historical Charging Station01Calculation methods and experimental techniquesThis study aims to reveal the quantum properties of Astatine, an artificially synthesized radioactive element with unique properties. However, due to its rarity and radioactivity, studying Astatine has always been challenging...
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Boost knowledge! Indecisive, quantum mechanics
In order to survive, humans have made tremendous efforts and sacrifices to win the victory of evolution, but the pace of evolution has never stoppedThe pursuit of progress by humans is endless, and the exploration of improving the speed of computer processing of information is equally persistent. As one of the greatest inventions in human history,Classic computerIt has brought great convenience to our production and life...
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