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Weak measurements and quantum-to-classical transitions in free electron-photon interactions

Light(Science & Applications) 2023年第11期12卷 2519-2529页

作者： Yiming Pan Eliahu Cohen Ebrahim Karimi Avraham Gover Norbert Schönenberger TomášChlouba Kangpeng Wang saar nehemia Peter Hommelhoff Ido Kaminer Yakir Aharonov School of Physical Science and Technology and Center for Transformative Science ShanghaiTech UniversityShanghai 200031China Department of Electrical Engineering TechnionHaifa 3200003Israel Department of Physics of Complex Systems Weizmann Institute of ScienceRehovot 7610001Israel Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials Bar Ilan UniversityRamat Gan 5290002Israel Department of Physics University of OttawaOttawaOntario K1N 6N5Canada Department of Electrical Engineering Physical Electronics Center for Laser-Matter Interaction(LMI)Tel Aviv UniversityRamat Aviv 6997801Israel Department of Physics Friedrich-Alexander Universität Erlangen-Nürnberg(FAU)Staudtstraße 191058 ErlangenGermany School of Physics and Astronomy Tel Aviv UniversityRamat Aviv 6997801Israel Institute for Quantum Studies Chapman UniversityOrangeCA 92866USA

How does the quantum-to-classical transition of measurement occur?This question is vital for both foundations and applications of quantum ***,we develop a new measurement-based framework for characterizing the classical and quantum free electron-photon interactions and then experimentally test *** first analyze the transition from projective to weak measurement in generic light-matter interactions and show that any classical electron-laserbeam interaction can be represented as an outcome of weak *** particular,the appearance of classical point-particle acceleration is an example of an amplified weak value resulting from weak measurement.A universal factor,exp(-Γ^(2)=2),quantifies the measurement regimes and their transition from quantum to classical,whereΓcorresponds to the ratio between the electron wavepacket size and the optical *** measurement-based formulation is experimentally verified in both limits of photon-induced near-field electron microscopy and the classical acceleration regime using a *** results shed new light on the transition from quantum to classical electrodynamics,enabling us to employ the essence of the wave-particle duality of both light and electrons in quantum measurement for exploring and applying many quantum and classical light-matter interactions.

关键词： quantum photon acceleration

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Udaan公园

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景观设计 2024年第1期22卷 38-43页

作者： Studio saar(文/图) 马建军(翻译) 杨庆鑫(翻译) 不详

该项目位于印度拉贾斯坦邦乌代浦尔,由一处废弃的湖滨公园改建而成,是一个开放、安全且包容的社区公园。公园内设置了迷宫、游乐区和以当地鸟类为设计灵感的遮阳棚,绿植茂盛,让市民与游客和自然生境重新建立联系。

关键词：社区公园湖滨公园遮阳棚拉贾斯坦邦自然生境设计灵感迷宫

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Consistent differences in foraging behavior in 2 sympatric harvester ant species may facilitate coexistence

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Current Zoology 2018年第5期64卷 653-661页

作者： Maya saar Aziz SUBACH Illan REATO Tal LIBER Jonathan N. PRUlTT Inon SCHARF Department of Zoology Faculty of Life Sciences Tel Aviv University Tel Aviv 69978 Israel and bDepartment of Ecology Evolution Marine Biology University of California Santa Barbara CA USA

The co-occurrence of 2 similar species depends on their ability to occupy different ecological niches. Here, we compared the consistency of different aspects of foraging behavior in 2 cooccurring harvester ant species （Messor ebeninus and Messor arenarius）, under field conditions. The 2 species are active concomitantly and display a similar diet, but M. arenarius features smaller colonies, larger workers on average, and a broader range of foraging strategies than M. ebeninus. We characterized the flora in the 2 species＇ natural habitat, and detected a nesting preference by M. arenarius for more open, vegetation-free microhabitats than those preferred by M. ebeninus. Next, we tested the food preference of foraging colonies by presenting 3 non-native seed types. Messor arenarius was more selective in its food choice. Colonies were then offered 1 type of seeds over 3 days in different spatial arrangements from the nest entrance （e.g., a seed plate close to the nest entrance, a seed plate blocked by an obstacle, or 3 plates placed at increasing distances from the nest entrance）. While both species were consistent in their foraging behavior, expressed as seed collection, under different treatments over time, M. ebeninus was more consistent than M. arenarius. These differences between the species may be expxained by their different colony size, worker size, and range of foraging strategies, among other factors. We suggest that the differences in foraging, such as in food preference and behavioral consistency while foraging, could contribute to the co-occurrence of these 2 species in a similar habitat.

关键词： behavioral consistency coexistence mechanisms foraging harvester ants plant-ant interactions.

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Developing Extensible Lattice-Boltzmann Simulators for General-Purpose Graphics-Processing Units

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Communications in Computational Physics 2013年第3期13卷 867-879页

作者： Stuart D.C.Walsh Martin O.saar Lawrence Livermore National Laboratory LivermoreCaliforniaUSA Department of Earth Sciences University of MinnesotaMinneapolisMinnesotaUSA

Lattice-Boltzmann methods are versatile numerical modeling techniques capable of reproducing a wide variety of fluid-mechanical *** methods are well suited to parallel implementation,particularly on the single-instruction multiple data(SIMD)parallel processing environments found in computer graphics processing units(GPUs).Although recent programming tools dramatically improve the ease with which GPUbased applications can be written,the programming environment still lacks the flexibility available to more traditional CPU *** particular,it may be difficult to develop modular and extensible programs that require variable on-device functionality with current GPU *** paper describes a process of automatic code generation that overcomes these difficulties for lattice-Boltzmann *** details the development of GPU-based modules for an extensible lattice-Boltzmann simulation *** performance of the automatically generated code is compared to equivalent purpose written codes for both single-phase,multiphase,and multicomponent *** flexibility of the new method is demonstrated by simulating a rising,dissolving droplet moving through a porous medium with user generated lattice-Boltzmann models and subroutines.

关键词： Lattice-Boltzmann methods graphics processing units computational fluid dynamics

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Steamship Connections to Haapsalu and Kuressaare Resorts

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Journal of Traffic and Transportation Engineering 2015年第2期3卷 103-110页

作者： Teele saar Estonian Maritime Museum Tallinn 10616 Estonia

This subject and the association with the resorts and their traffic connections had developed from a formerly studied subject：＂maritime connections to Haapsalu--how the vacationer arrived in the resort＂. After the first passenger steamer, PS Comet, was deployed in 1812 on the river Clyde, this new vessel type was used for commercial services. It was recognized quite soon that steamboats had big potential for recreational activities. This paper uses the deductive and the comparative historical methods to examine how these trends were followed in the Baltic region. Deductive method is used for explaining the common trends in using the early steamers, for example, Baltic region. Comparative history method is, on the one hand, used for showing the differences and similarities between Baltic region and Europe steamers traffic developments in 19th century. On the other hand, there is used comparison of the steamer routes and their coherence with resorts vacationer numbers. The aim of this paper is to explain how resorts were integrated into steamship schedules by shipping companies operating in the Baltic provinces of the Russian Empire.

关键词： Steamship resort steamer company passenger vacationer.

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The Colider and Roosevelt olcanic rocks (sw amazonian craton): geochemistry and sm-nd isotope characteristics of a silicic large igneous province

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Acta Geochimica 2021年第6期40卷 1023-1049页

作者： Bruna saar de Almeida Mauro César Geraldes Carlos Augusto Sommer Felipe Corrales Antonio Joāo Paes de Barros Universidade do Estado do Rio de Janeiro Rio de JaneiroBrazil University of Geneva GenevaSwitzerland Universidade Federal do Rio Grande do Sul Rio Grande do SulBrazil METAMAT(Mato Grosso State Geological Survey) CuiabaBrazil

The volcanic rocks of the Colíder and Roosevelt formations are extensively exposed in the south-central portion of the Amazonian Craton where effusive and pyroclastic rocks have been *** units,topped by chemical sediments and oceanic facies as rhyolite and andesite lavas,rhyodacite,and porphyritic dacite,with frequent intercalations of pyroclastic and epiclastic ***-rock geochemistry for 55 samples of rhyolitic to andesitic composition suggests the involvement of fertile mantle-derived components with E-MORB to OIB *** analyzed rocks display calc-alkaline to shoshonitic affinity consistent with generation related to an active continental *** whole-rock Sm-Nd isotope data from selected felsic volcanic rocks of the Colíder and Roosevelt formations yield negative initial eNd values between–3 and–9,indicating the predominantly crustal nature of the parental magmas with early Archean to late Paleoproterozoic(ca.2.5–2.0 Ga)depleted mantle model ages.

关键词： Amazonian craton Geochemistry Sm-Nd isotopes Paleoproterozoic Volcanism

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A numerical investigation into key factors controlling hard rock excavation via electropulse stimulation

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第4期12卷 793-801页

作者： Daniel Vogler Stuart DCWalsh Martin Osaar Geothermal Energy and Geofluids Institute of GeophysicsETH ZurichZurichSwitzerland Department of Civil Engineering Monash UniversityMelbourneAustralia Department of Earth and Environmental Sciences University of MinnesotaMinneapolisUSA

Electropulse stimulation provides an energy-efficient means of excavating hard rocks through repeated application of high voltage pulses to the rock *** such,it has the potential to confer significant advantages to mining and drilling operations for mineral and energy ***,before these benefits can be realized,a better understanding of these processes is required to improve their deployment in the *** this paper,we employ a recently developed model of the grain-scale processes involved in electropulse stimulation to examine excavation of hard rock under realistic operating *** that end,we investigate the maximum applied voltage within ranges of 120e600 kV,to observe the onset of rock *** further study the effect of grain size on rock breakage,by comparing fine(granodiorite)and coarse grained(granite)***,the pore fluid salinity is investigated,since the electric conductivity of the pore fluid is shown to be a governing factor for the electrical conductivity of the modeled *** study demonstrates that all investigated factors are crucial to the efficiency of rock fragmentation by electropulsing.

关键词： Electropulse stimulation High voltage breakdown Numerical modeling Drilling Thermo-mechanics

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经I/O优化的FPGA

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今日电子 2009年第4期 31-31,34页

作者： Hezi saar 爱特公司

电池供电和功耗敏感应用的迅猛增长刺激了全球对低功耗半导体的需求。今天，功耗敏感应用的人员面对更加严格的系统总体功耗限制、规范和标准。今天，功耗敏感应用的设计人员正面对着更严格的系统总体功耗限制、规范和标准。与此同时，... 详细信息

电池供电和功耗敏感应用的迅猛增长刺激了全球对低功耗半导体的需求。今天，功耗敏感应用的人员面对更加严格的系统总体功耗限制、规范和标准。今天，功耗敏感应用的设计人员正面对着更严格的系统总体功耗限制、规范和标准。与此同时，这些应用对功能、性能和复杂性的要求也在增加，但却不能增加电池消耗或成本。

关键词： FPGA I/O 优化电池供电低功耗设计人员应用半导体

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采用Flash*Freeze技术进行低功耗设计

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电子设计应用 2007年第11期 26-26,28页

作者： Hezi saar Actel公司

系统设计工程师越来越重视功耗问题。原因是系统整体功耗现在受制于各种更严格的功率限制、规范和标准。功率预算的多少将关系到产品的使用寿命、可靠性，以及产品是否满足各种标准的问题。

关键词：低功耗设计技术设计工程师功率限制使用寿命功率预算可靠性系统

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秩序、实践、主体:什么是社会哲学?

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世界哲学 2023年第4期 27-35页

作者： [德]M.萨尔孙海洋(译) 法兰克福大学哲学系中共中央党校(国家行政学院)哲学部

社会哲学是以社会本身为出发点的特定的哲学实践,它将哲学问题置于社会性视角之下予以审视和反思,这一特定的研究视角构成了社会哲学的前提性规定。哲学研究视域中的社会,并非一个具体的对象,而是一组社会关系的集合,它们以不同的形式... 详细信息

社会哲学是以社会本身为出发点的特定的哲学实践,它将哲学问题置于社会性视角之下予以审视和反思,这一特定的研究视角构成了社会哲学的前提性规定。哲学研究视域中的社会,并非一个具体的对象,而是一组社会关系的集合,它们以不同的形式——秩序、实践和主体——出现在三个不同的层面上。在社会的上述诸层面上,存在着三种不同的权力形式运作其中,秩序层面是统治,实践层面是规范化,主体层面是主体化。在此意义上,社会哲学就转化为对权力的分析和批判的实践。作为对上述权力形式的反对,三种不同的政治形式由此产生,这就是(激进)民主、反抗和自我转化。这种对改变既定的社会关系之可能性的反思,及其通向的完全不同的总体社会图景,恰恰是一种理论之所以具有批判性的标志。换言之,这是一种作为批判理论的社会哲学。

关键词：社会哲学秩序实践主体权力政治

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