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Generalized Kibble-Zurek mechanism for inhomogeneous systems

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Science China(Physics,Mechanics & Astronomy) 2023年第8期66卷 162-162页

作者： Gui-lu long Department of Physics Tsinghua UniversityBejing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

The Kibble-Zurek(KZ)mechanism was first proposed in 1976,which broadly describes the topological defect generation in cosmology in spontaneous symmetry breaking[1].Later,Zurek[2]conducted extensive studies and demonst... 详细信息

关键词： mechanism defect inhomogeneous

Fabrication of corrosion inhibiting microcapsules functional coating and their high-efficiency corrosion resistance

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Rare Metals 2024年第2期43卷 842-848页

作者： Hao-Ran Yun lu lu Xue-long Hao Xing-Xiang Zhang School of Material Science and Engineering Tiangong UniversityTianjin300387China National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials General Research Institute for Nonferrous MetalsBeijing100088China Guobiao(Beijing)Testing&Certification Co. Ltd.Beijing101407China

Benzotriazole(BTA)was loaded into calcium carbonate microsphere shell by self-assembly method and a new type of high-efficiency corrosion inhibiting microcapsules(CIMs)were fabricated,which were added and dispersed into epoxy resin coating to obtain a new corrosion resistance functional *** corrosion inhibition effect of benzotriazole on aluminum alloy matrix was verified by polarization curve *** effectiveness of the CIMs and their loading capacity on inhibitor were evaluated by scanning electron microscope,laser confocal Raman spectroscopy together with thermogravimetric analysis.

关键词： corrosion coating resistance

Raman lasing and Fano lineshapes in a packaged fiber-coupled whispering-gallery-mode microresonator

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Science Bulletin 2017年第12期62卷 875-878页

作者： Guangming Zhao Sahin Kaya Ozdemir Tao Wang Linhua Xu Eshan King Gui-lu long Lan Yang Department of Electrical and Systems Engineering Washington University in St.LouisMO 63130USA State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China

We report Raman lasing and the optical analog of electromagnetically-induced-transparency(EIT) in a whispering-gallery-mode(WGM) microtoroid resonator embedded in a low refractive index polymer matrix together with a tapered fiber coupler. The microtoroid resonator supports both single mode and multimode Raman lasing with low power thresholds. Observations of Fano and EIT-like phenomena in a packaged microresonator will enable high resolution sensors and can be used in networks where slow-light effect is needed. These results will open up new possibilities for portable, robust, and stable WGM microlasers and resonator-based sensors for applications in various environments.

关键词： MicrocavitiesOptical resonatorsPackagingRaman lasingFano resonanceEIT

Linguistic landscape and its impacts on place-making in mountain destination:A case of Mogan Mountain Town of Huzhou City,China

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Journal of Mountain Science 2024年第5期21卷 1613-1629页

作者： LI Chenyan lu Song long Cheng ZHU Jiaheng School of Tourism Shanghai Normal UniversityShanghai 200034China School of Environmental and Geographical Sciences Shanghai Normal UniversityShanghai 200034China

The place and placeness are believed to be a crucial perspective for comprehending the transformative dynamics of tourist destinations in the context of globalization and the rapid development of the tourism *** the material carrier of language,linguistic landscape is an intermediary for people to endow emotions and personalities into the place,becoming an effective path for exploring the place-making in a certain *** Mountain is a famous national tourist resort,which is located in Mogan Mountain Town,Deqing County,Huzhou City,*** is a good case area for studying the relationship between linguistic landscape and placemaking in tourist *** are two theories that form the theoretical foundation of the study,namely the place and the ***,the results showed the overall style of the linguistic *** labelling(52.7%),official signs(55.3%),and standardized Chinese characters predominantly shaped the linguistic landscape,with English and other languages being ***,from the perspective of three dimensions of the geosemiotics framework,such as inscription,language preference,and placement position,we conduct a comprehensive semiotic analysis of the linguistic landscape,which encompasses diverse facets such as fonts,materials,shifts in state,text vectors,and symmetrical ***,we explore the influence of linguistic landscapes on the place-making of Mogan Mountain through the dimensions of location,locale,and sense of *** information on linguistic landscapes indicates the geographical *** linguistic landscapes play an important role in constructing the language order,nostalgic atmosphere,exotic atmosphere,and elegant and tasteful lifestyle of the public space in Mogan *** of linguistic landscapes,including tourists and residents,generate and identify with the unique sense of place in Mogan *** linguistic landscapes construct the destinati

关键词： Linguistic landscape Place-making Tourist destination Geosemiotics Place theory Place branding Mogan Mountain Town China

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BIM技术在市政道路设计与养护中的应用

工程建设（维泽科技） 2024年第3期7卷 78-81页

作者：卢龙北京市市政工程设计研究总院有限公司保定分公司河北石家庄050000

市政道路设计与养护面临着日益复杂的挑战,而BIM技术的崛起为这一领域注入了新的活力。文中探讨了BIM技术在市政道路领域的具体应用,包括其在设计阶段的全生命周期信息管理、可视化和模拟能力,以及在养护阶段的精细化管理和智能化决策... 详细信息

市政道路设计与养护面临着日益复杂的挑战,而BIM技术的崛起为这一领域注入了新的活力。文中探讨了BIM技术在市政道路领域的具体应用,包括其在设计阶段的全生命周期信息管理、可视化和模拟能力,以及在养护阶段的精细化管理和智能化决策支持。通过对BIM技术在市政道路设计与养护中的优势的深入分析,为市政道路工程管理提供新的思路和解决方案,推动这一领域向着更智能、可持续的方向发展。

关键词： BIM技术市政道路设计市政道路养护技术应用

Decoupling Bang-Bang Group for Adiabatic Decoherence Control in a Three-Level Atom

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Communications in Theoretical Physics 2005年第5X期44卷 810-814页

作者： LIU Xiao-Shu WU Re-Bing LIU Yang LIU Wen-Zhang long Gui-lu Key Laboratory for Quantum Information and Measurements and Department of Physics Tsinghua University Beijing 100084 China Department of Automation Tsinghua University Beijing 100084 China Key Laboratory for Atomic and Molecular Nano-sciences Tsinghua University Beijing 100084 China

In this paper, we study the control problem of adiabatic decoherence in a three-level atom. We will find the decoupling bang-bang group for various configurations, including the V configuration and the cascade type of three-levelatom subjected to adiabatic decoherence. We also give the programs to design a sequence of periodic twinborn pulses to suppress the decoherence.

关键词： decoupling bang-bang group three-level atom adiabatic decoherence

Generic security analysis framework for quantum secure direct communication

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Frontiers of physics 2021年第2期16卷 23-31页

作者： Zhang-Dong Ye Dong Pan Zhen Sun Chun-Guang Du Liu-Guo Yin Gui-lu long State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China School of Information and Technology Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Beijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

Quantum secure direct communication provides a direct means of conveying secret information via quantum states among legitimate *** past two decades have witnessed its great strides both theoretically and ***,the security analysis of it still stays in its *** practical problems in this field to be solved urgently,such as detector efficiency mismatch,side-channel effect and source imperfection,are propelling the birth of a more impeccable *** this paper,we establish a new framework of the security analysis driven by numerics where all the practical problems may be taken into account *** apply this framework to several variations of the DL04 protocol considering real-world experimental ***,we propose two optimizing methods to process the numerical part of the framework so as to meet different requirements in *** these properties considered,we predict the robust framework would open up a broad avenue of the development in the field.

关键词： quantum secure direct communication(QSDC) practical security analysis secrecy capacity optimization detectory efficiency mismatch convex optimization

Measurement-device-independent quantum communication without encryption

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Science Bulletin 2018年第20期63卷 1345-1350页

作者： Peng-Hao Niu Zeng-Rong Zhou Zai-Sheng Lin Yu-Bo Sheng Liu-Guo Yin Gui-lu long state Key Laboratory of Low-dimensional Quantum Physics Beijing 100084.China Department of Physics Tsinghua UniversityBeijing 100084China Collaborative Innovation Center of Quantum Matter Beijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China Beijing National Research Center for Information Science and Technology BeUing 100084China School of Information and Technology.Tsinghua University Beijing 100084China lnstiute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Telecommunications &Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and TelecommunicationsMinistry of EducationNanjing 210003China

Security in communication is vital in modern life. At present, security is realized by an encryption process in cryptography. It is unbelievable if a secure communication is achievable without encryption. In quantum cryptography, there is a unique form of quantum communication, quantum secure direct communication, where secret information is transmitted directly over a quantum channel. Quantum secure direct communication is drastically distinct from our conventional concept of secure communication, because it does not require key distribution, key storage and ciphertext transmission, and eliminates the encryption procedure completely. Hence it avoids in principle all the security loopholes associated with key and ciphertext in traditional secure communications. For practical implementation, defects always exist in real devices and it may downgrade the security. Among the various device imperfections, those with the measurement devices are the most prominent and serious ones. Here we report a measurementdevice-independent quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs. This protocol eradicates the security vulnerabilities associated with the measurement device,and greatly enhances the practical security of quantum secure direct communication. In addition to the security advantage, this protocol has an extended communication distance, and a high communication capacity.

关键词： Quantum secure direct communication Measurement-device-independent Quantum dialogue Encryption Cryptography

Biochar-bacteria partnership based on microbially induced calcite precipitation improves Cd immobilization and soil function

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Biochar 2023年第1期5卷 367-380页

作者： Min Xu Jing Ma Xiao-Hong Zhang Gang Yang lu-lu long Chao Chen Chun Song Jun Wu Peng Gao Dong-Xing Guan College of Environmental Science Sichuan Agricultural UniversityChengdu 611130China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa’an 625014China Department of Environmental and Occupational Health and Department of Civil and Environmental EngineeringUniversity of PittsburghPittsburgh 15261USA Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

Microbially induced calcite precipitation(MICP)technique utilizes ureolytic bacteria to decompose urea and generate carbonate ions for metal *** can remediate heavy metal(e.g.,Cd)contaminated soils while maintaining or even improving soil functions,but its efficiency in agricultural soil practical application still needs to be ***,we constructed a biochar-bacteria(2B)partnership in which biochar provides high nutrition and diverse sorption *** the 2B system,Cd immobilization effectiveness and the underlying mechanism were examined along with the soil properties and soil *** showed that compared to the single biochar and ureolytic bacteria systems,soil Cd mobility was reduced by 23.6%and 45.8%through co-precipitating with CaCO_(3) as otavite(CdCO_(3))in the 2B system,whereas soil fertility,bacterial diversity,and richness increased by 11.7-90.2%,5.4-16.1%,and 6.8-54.7%,***,the abundances of Proteobacteria and Firmicutes were enhanced in the 2B ***,Sporosarcina and Bacillus(Firmicutes genus)that carry the ureC gene were boosted in the system,further implicating the microbiological mechanism in reducing Cd migration and its bioavailability in ***,the constructed 2B system was efficient in soil Cd immobilization by strengthening the ureolytic bacteria growth and their nutrient supply in the bacteria-rich soil ecosystem.

关键词： Microbially induced calcite precipitation(MICP) Biochar-bacteria system Cd immobilization Carbonate Nitrogen cycle