检索结果-南通市图书馆

Observation of dark edge states in parity-time-symmetric quantum dynamics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2023年第8期10卷 156-165页

作者： Peng Xue Xingze Qiu Kunkun Wang barry c. sanders Wei Yi Beijing computational Science Research center Key Laboratory of Quantum Information University of Science and Technology of China Chinese Academy of Sciences Synergetic Innovation center in Quantum Information and Quantum Physics University of Science and Technology of China Chinese Academy of Sciences 4. School of Physics and Optoelectronic Engineering Anhui University Shanghai Branch National Laboratory for Physical Sciences at MicroscaleUniversity of Science and Technology of China Institute for Quantum Science and Technology University of Calgary Program in Quantum Information Science Canadian Institute for Advanced Research

Topological edge states arise in non-Hermitian parity-time(PT)-symmetric systems, and manifest themselves as bright or dark edge states, depending on the imaginary components of their eigenenergies. As the spatial probabilities of dark edge states are suppressed during the non-unitary dynamics, it is a challenge to observe them experimentally. Here we report the experimental detection of dark edge states in photonic quantum walks with spontaneously broken PT symmetry, thus providing a complete description of the topological phenomena therein. We experimentally confirm that the global Berry phase in PT-symmetric quantum-walk dynamics unambiguously defines topological invariants of the system in both the PT-symmetry-unbroken and-broken regimes. Our results establish a unified framework for characterizing topology in PT-symmetric quantum-walk dynamics, and provide a useful method to observe topological phenomena in PT-symmetric non-Hermitian systems in general.

关键词： parity-time symmetry photonic quantum walks dark edge states topological invariants

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

实验验证量子非局域性与互文性的单婚性关系

实验验证量子非局域性与互文性的单婚性关系

第十七届全国量子光学学术会议

作者：詹翔张欣李剑张永生 barry c.sanders 薛鹏东南大学物理系中国科学技术大学中国科学院量子信息重点实验室 Institute for Quantum Science and Technology University of Calgary

＜正＞1935年,爱因斯坦、波多尔斯基和罗森提出了著名的EPR佯谬,他们以量子力学基本原理为基础,推导出与经典理论中的定域实在论相矛盾的结论,以此对量子力学提出了质疑。除了定域实在性,量子力学还与经典的语境实在性相互矛盾,即量子...

＜正＞1935年,爱因斯坦、波多尔斯基和罗森提出了著名的EPR佯谬,他们以量子力学基本原理为基础,推导出与经典理论中的定域实在论相矛盾的结论,以此对量子力学提出了质疑。除了定域实在性,量子力学还与经典的语境实在性相互矛盾,即量子力学中的关联具有互文性。通过量子纠缠验证量子力学的非定域性和互文性的实验屡见不鲜。但是先前的研究却从

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

一维光量子行走实现单比特正定算子测量

一维光量子行走实现单比特正定算子测量

Ionic liquid electrolytes for sodium-ion batteries to control thermal runaway

第十七届全国量子光学学术会议

作者：边志浩李剑秦豪詹翔张融 barry c.sanders 薛鹏东南大学物理系 Institute for Quantum Science and Technology University of Calgary

＜正＞众所周知,量子力学中对于非正交态的准确性识别是被禁止的。非正交态的部分识别是量子信息处理中的很重要的内容,要对非正交态进行识别,我们需要进行广义测量,即正定算子测量（POVM）。对系统进行POVM,等同于对系统加一个辅助体...

＜正＞众所周知,量子力学中对于非正交态的准确性识别是被禁止的。非正交态的部分识别是量子信息处理中的很重要的内容,要对非正交态进行识别,我们需要进行广义测量,即正定算子测量（POVM）。对系统进行POVM,等同于对系统加一个辅助体系进行正交测量。对于量子行走来说,行走者和硬币的纠缠体系和正交测量可以构成对单比特的POVM。用量

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2023年第6期81卷 321-338,I0008页

作者： Keith Sirengo Aswathy Babu barry Brennan Suresh c.Pillai Nanotechnology and Bio-Engineering Research Group Department of Environmental ScienceAtlantic Technological UniversityATU SligoAsh LaneSligo F91 YW50Ireland Health and Biomedical(HEAL)Strategic Research centre Atlantic Technological UniversityATU SligoAsh LaneSligo F91 YW50Ireland

Sodium-ion batteries are expected to be more affordable for stationary applications than lithium-ion batteries,while still offering sufficient energy density and operational capacity to power a significant segment of the battery *** this,thermal runaway explosions associated with organic electrolytes have led to concerns regarding the safety of sodium-ion *** electrolytes,ionic liquids are promising because they have negligible vapor pressure and show high thermal and electrochemical *** review discusses the safety contributions of these electrolyte properties for high-temperature *** ionic liquids provide thermal stability while at the same time promoting high-voltage window battery ***,apart from cycle stability,there is an additional safety feature attributed to modified ultra-concentrated ionic liquid *** these contributions,the following have been discussed,heat sources and thermal runaway mechanisms,thermal stability,the electrochemical decomposition mechanism of stable cations,and the ionic transport mechanism of ultra-concentrated ionic liquid *** addition,the contributions of hybrid electrolyte systems consisting of ionic liquids with either organic carbonate or polymers are also *** thermal stability of ionic liquids is found to be the main contributor to cell safety and cycle *** high-temperature applications where electrolyte safety,capacity,and cycle stability are important,highly concentrated ionic liquid electrolyte systems are potential solutions for sodium-ion battery applications.

关键词： Thermal stability Ionic liquids Sodium-ion batteries cycle stability Ionic conductivity

Economic Markets and Higher Education:Ethical Issues in the United States and china

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Education in china 2014年第1期9卷 63-88页

作者： barry c.KEENAN Department of History Denison UniversityGranvilleOH 43023USA

Educational values in both the United States and in china have suffered from the social and political reach of economic markets in each *** models for counteracting the marketization of values in higher education can however be found in each country’s past educational ***,the developmental values inherent in small liberal arts college teaching dovetail easily with the personal developmental benefits in the pedagogy of classical confucian academies,as both center on the validation of the process by which students learn for themselves.

关键词： higher education ethics economic markets

Using modeling and simulation and artificial intelligence to improve complex adaptive systems engineering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Modeling, Simulation, and Scientific computing 2022年第2期13卷 70-90页

作者： Andreas Tolk Philip barry Steven c.Doskey The MITRE corporation 1001 Research Park Blvd#220 CharlottesvilleVA 22911USA George Mason University 4400 University DrFairfax VA 22030USA The MITRE corporation 7525 Colshire DrMcLean VA 22102USA

Systems engineering practices are evolving to address fast-changing needs in fielding complex *** needs create an environment in which system needs evolve or change too quickly to be tracked or managed by humans’natural *** propose that systems engineering must aid systems engineering managers by providing architectural alternatives and design ***,as systems become more complex and dynamic,there is an increased need to identify hidden risks,model emergent behav-ior,and expose hidden patterns in the behavior of *** engineering needs to evolve to build fast-fielded,resilient,and adaptive systems that leverage posi-tive reinforcement feedback loops with multiple experimental and real-world information *** very basis of systems engineering must evolve from today’s development paradigms to a future that leverages modeling,simulation,and artificial intelligence to drastically improve the capability and agility for developing new *** paper proposes a common way forward to enable this new form of complex adaptive systems engineering.

关键词： complex systems digital twin systems engineering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

在香港看到的“耀中幼教教学法”

早期教育（幼教·教育教学） 2020年第6期 17-19页

作者： Stephanie c.sanders-Smith 刘萌然美国伊利诺伊大学香槟分校新西兰奥克兰大学

香港“耀中幼教教学法”,是由陈保琼博士自20世纪70年代从美国学成归国,构建“游戏中学习”的早期教育课程开始,经过50年的实践,逐渐形成的系统的教学法。在香港耀中幼儿园,我们看到了耀中幼教教学法的实践情形。每天入学、放学时,你会... 详细信息

香港“耀中幼教教学法”,是由陈保琼博士自20世纪70年代从美国学成归国,构建“游戏中学习”的早期教育课程开始,经过50年的实践,逐渐形成的系统的教学法。在香港耀中幼儿园,我们看到了耀中幼教教学法的实践情形。每天入学、放学时,你会看到穿着耀中园服进进出出的幼儿园孩子,色彩和谐、式样俊美的园服,让孩子们看上去活力四射。但更让我们好奇的不是这些,而是在耀中幼儿园,孩子们究竟是怎样度过一天又一天的。

关键词：色彩和谐幼教耀中活力四射教学法幼儿园早期教育课程游戏中学习

c. H. Pander＇s introduction to conodonts, 1856

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Episodes 2008年第4期31卷 429-432页

作者： Sweet, Walter c. cooper, barry J. School of Earth Sciences The Ohio State University Columbus OH 43210 United States Primary Industries and Resources South Australia Adelaide SA 5001 GPO Box 1671 Australia

It is rare in the annals of science for a single publication to provide a definitive introduction to a previously unknown group of animals. Yet this was the case with the monograph that included the initial descriptions of an important, extinct group of fossil animals： the conodonts. The publication, by christian Heinrich Pander, appeared in St Petersburg in 1856. The volume of ninety-one pages, written in German and accompanied by seven beautifully executed plates, was issued by the Imperial Academy of Sciences as part of a series entitled Geognostische Beschreibung der Russisch-Baltischen Gouvernements.

关键词：动物科学动物化石牙形石科学研究

Machine Learning Models of Plastic Flow Based on Representation Theory

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

computer Modeling in Engineering & Sciences 2018年第12期117卷 309-342页

作者： R.E.Jones J.A.Templeton c.M.sanders J.T.Ostien Sandia National Laboratories P.O.Box 969LivermoreCA 94551USA.

We use machine learning(ML)to infer stress and plastic flow rules using data from representative polycrystalline *** particular,we use so-called deep(multilayer)neural networks(NN)to represent the two response *** ML process does not choose appropriate inputs or outputs,rather it is trained on selected inputs and ***,its discrimination of features is crucially connected to the chosen inputoutput ***,we draw upon classical constitutive modeling to select inputs and enforce well-accepted symmetries and other *** the context of the results of numerous simulations,we discuss the design,stability and accuracy of constitutive NNs trained on typical experimental *** these developments,we enable rapid model building in real-time with experiments,and guide data collection and feature discovery.

关键词： Machine learning constitutive modeling plasticity invariance.