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Quantum repeaters: From quantum networks to the quantum internet

Reviews of modern Physics 2023年第4期95卷 045006-045006页

作者： Koji Azuma Sophia E. Economou David Elkouss Paul Hilaire Liang Jiang Hoi-Kwong Lo Ilan Tzitrin NTT Basic Research Laboratories NTT Corporation 3-1 Morinosato-Wakamiya Atsugi Kanagawa 243-0198 Japan and NTT Research Center for Theoretical Quantum Information NTT Corporation 3-1 Morinosato-Wakamiya Atsugi Kanagawa 243-0198 Japan Department of Physics Virginia Tech Blacksburg Virginia 24061 USA QuTech Delft University of Technology Lorentzweg 1 2628 CJ Delft The Netherlands and Networked Quantum Devices Unit Okinawa Institute of Science and Technology Graduate University Okinawa Japan Department of Physics Virginia Tech Blacksburg Virginia 24061 USA and Quandela SAS 10 Boulevard Thomas Gobert 91120 Palaiseau France Pritzker School of Molecular Engineering The University of Chicago Chicago Illinois 60637 USA Quantum Bridge Technologies Inc. 100 College Street Toronto Ontario M5G 1L5 Canada Department of Physics University of Hong Kong Pokfulam Hong Kong and Center for Quantum Information and Quantum Control Department of Physics and Department of Electrical and Computer Engineering University of Toronto Toronto Ontario M5S 3G4 Canada Department of Physics University of Toronto Toronto Ontario Canada

A quantum internet is the holy grail of quantum information processing, enabling the deployment of a broad range of quantum.technologies and protocols on a global scale. However, numerous challenges must be addressed before the quantum internet can become a reality. Perhaps the most crucial of these is the realization of a quantum repeater, an essential component in the long-distance transmission of quantum information. As the analog of a classical repeater, extender, or booster, the quantum repeater works to overcome loss and noise in the quantum channels constituting a quantum network. Here the conceptual frameworks and architectures for quantum repeaters, as well as the experimental progress toward their realization, are reviewed. Various near-term proposals to overcome the limits to the communication rates set by point-to-point quantum communication are also discussed. Finally, the manner in which quantum repeaters fit within the broader challenge of designing and implementing a quantum internet is overviewed.

关键词： Quantum communication Quantum memories Quantum networks Quantum repeaters Internet

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Click Fraud Detection Approaches to analyze the Ad Clicks Performed by malicious Code

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Journal of Physics: Conference Series 2021年第1期2089卷

作者： mahesh Bathula Rama Chaithanya Tanguturi Srinivasa Rao madala M.Tech. Scholar Department of Computer Science and Engineering PACE Institute of Technology and Sciences Professor Department of Computer Science and Engineering PACE Institute of Technology and Sciences Professor & HOD Department of Computer Science and Engineering PACE Institute of Technology and Sciences

mobile PR is an important component of the mobile app ecosystem. A major threat to this ecosystem's long-term health is click fraud, which involves clicking on ads while infected with malware or using an automated bot to do it for you. The methods used to identify click fraud now focus on looking at server requests. Although these methods have the potential to produce huge numbers of false negatives, they may easily be avoided if clicks are hidden behind proxies or distributed globally. AdSherlock is a customer-side (inside the app) efficient and deployable click fraud detection system for mobile applications that we provide in this work. AdSherlock separates the computationally expensive click request identification procedures into an offline and online approach. AdSherlock uses URL (Uniform Resource Locator) tokenization in the Offline phase to create accurate and probabilistic patterns. These models are used to identify click requests online, and an ad request tree model is used to detect click fraud after that. In order to develop and evaluate the AdSherlock prototype, we utilise actual applications. It injects the online detector directly into an executable software package using binary instrumentation technology (BIT). The findings show that AdSherlock outperforms current state-of-the-art methods for detecting click fraud with little false positives. Advertisement requests identification, mobile advertising fraud detection are some of the keywords used in this article.

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Fully integrated Si-rich silicon nitride wavelength converter based on Bragg scattering intermodal four-wave mixing

Fully integrated Si-rich silicon nitride wavelength converte...

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49th European Conference on Optical Communications (ECOC 2023)

作者： V. Vitali T. D. Bucio H. Liu J. m. L. González F. Jurado-Romero A. Ortega-moñux G. Churchill J. C. Gates J. Hillier N. Kalfagiannis D. melati J. H. Schmid I. Cristiani P. Cheben J. G. Wangüuemert-Pérez Í. molina-Fernández F. Gardes C. Lacava P. Petropoulos Optoelectronics Research Centre University of Southampton Southampton SO17 1BJ UK Telecommunication Research Institute (TELMA) Universidad de Málaga CEI Andalucía TECH E.T.S.I. Telecomunicación 29010 Málaga Spain School of Science and Technology Nottingham Trent University Nottingham NG11 8NS UK Centre de Nanosciences et de Nanotechnologies Université Paris-Saclay CNRS 91120 Palaiseau France Advanced Electronics and Photonics Research Center National Research Council Canada 1200 Montreal Road Ottawa ON K1A 0R6 Canada Electrical Computer and Biomedical Engineering Department University of Pavia Pavia 27100 Italy

We report the demonstration of an integrated silicon-rich silicon nitride wavelength converter based on Bragg scattering intermodal four-wave mixing process. The system integrates mode conversion, multiplexing and de-multiplexing functionalities on chip. Broadband signal conversion with a 3dB bandwidth exceeding 70 nm is demonstrated.

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Secure and reliable routing protocols for VANETs 4

Secure and reliable routing protocols for VANETs

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4th IEEE International Conference on Computing Communication and Automation, ICCCA 2018

作者： Yadav, Savita Rajput, Neetu Kumari Sagar, Anil Kumar maheshwari, Divya M.Tech CSE School of Computing Science and Engineering Galgotias University Greator Noida U.P India

ISBN: (纸本)9781538669471

VANETs stands for vehicular ad hoc networks which is a new technology and works for vehicles. The main aim of this technology is to provide security or safeness which is applicable to all those persons who are sitting in vehicles. VANETs are applicable for providing communications amid vehicles without any necessity of determinate infrastructure. VANETs are useful for providing information amid vehicles because it is not necessary that drivers are aware during the time of driving. It is very difficult to implement an expeditious routing protocol amid vehicles due to propellant features of vehicular environment. The nodes which are used in VANETs have rattling advanced mobility. To reach the final destination, there are plenty of challenges for routing the packets. It creates ambitious technical contents due to prevalent refinements of network topology which is necessary to tackle efficiently. One of the major critical contents is the routing infallibility. End to end of this paper, the main aim is that the researchers and developers could take hold the most disputes and endeavors of the routing protocols by taking the benefits of information. They can take hold in such a way for improving their lustiness and reliability in VANETs. This article has a brief summary of all the routing protocols which are used in VANETs. This paper will be also helpful in elaborating the demerits and demerits of the active routing protocols. It will give a detailed depiction about the different active routing techniques. A detailed depiction will be provided in connection with some merits and demerits and different constraints. In this paper, comparison of all the active routing protocols are also defined which is based on their speed, conveyance, PDR, quantifiability and feasibleness. © 2018 IEEE.

关键词： Routing protocols

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Lateral and torsional vibration analysis of composite shaft

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IOP Conference Series: materials science and engineering 2020年第2期912卷

作者： U Rajkiran A Vinoth K Jegadeesan C Shravankumar Department of Mechanical Engineering M.Tech (CAD) SRM Institute of Science and Technology Chennai India

In Energy Industries reliability of rotating equipment's plays a key role in overall plant reliability and safer operation, in fact maintaining these equipment's in larger scale is a challenging task. The magnitude of vibration in rotating equipment's is high when the rotor excitation force coincides with the natural frequency. This paper deals with the comparison study on existing steel shaft over laminated composite shaft's lateral and torsional critical speed, which aims to optimize the natural frequency. The rotor system model represented here is undamped, without disc and simply supported with bearing for lateral vibration analysis and considering two discs at ends for torsional vibration analysis. The analysis report represents the comparison of both steel and laminated composite shaft, which features with Campbell diagram.

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Digital Twins of Business Processes: A Research manifesto

arXiv

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arXiv 2024年

作者： Fornari, Fabrizio Compagnucci, Ivan De Donato, massimo Callisto Bertrand, Yannis Beyel, Harry H. Carrión, Emilio Franceschetti, marco Groher, Wolfgang Grüger, Joscha Kilic, Emre Koschmider, Agnes Leotta, Francesco Li, Chiao-Yun Lugaresi, Giovanni malburg, Lukas mangler, Juergen mecella, massimo Pastor, Oscar Riss, Uwe Seiger, Ronny Serral, Estefania Torres, Victoria Valderas, Pedro University of Camerino School of Science and Technology Computer Science Department Via Madonna delle Carceri 7 Camerino62032 Italy Gran Sasso Science Institute Computer Science Department Viale Francesco Crispi 7 L’Aquila67100 Italy University of St.Gallen Institute of Computer Science Rosenbergstrasse 30 St.Gallen9000 Switzerland University of Bayreuth Business Informatics and Process Analytics Wittelsbacherring 8 Bayreuth95444 Germany Fraunhofer Institute for Applied Information Technology Schloss Birlinghoven Sankt Augustin53757 Germany RWTH Aachen University Ahornstraße 55 Aachen52074 Germany Mercadona Tech Mercadona Plaza de Amèrica 2 Valencia46004 Spain PROS Research Center - VRAIN Institute Universitat Politècnica de València Camino de Vera Valencia46022 Spain TU Dortmund University Leonhard-Euler-Str. 5 Dortmund44227 Germany KU Leuven Warmoesberg 26 Brussels1000 Belgium Sapienza Università di Roma DIAG via Ariosto 25 Rome00185 Italy KU Leuven Faculty of Engineering Technology Celestijnenlaan 300 Leuven3001 Belgium Branch Trier University Behringstraße 21 Trier54296 Germany Artificial Intelligence and Intelligent Information Systems Trier University Universitätsring 15 Trier54296 Germany OST Eastern Switzerland University of Applied Sciences Rosenbergstrasse 59 St. Gallen9001 Switzerland TUM School of Computation Information and Technology Boltzmannstraße 3 Garching bei München85748 Germany

modern organizations necessitate continuous business processes improvement to maintain efficiency, adaptability, and competitiveness. In the last few years, the Internet of Things, via the deployment of sensors and actuators, has heavily been adopted in organizational and industrial settings to monitor and automatize physical processes influencing and enhancing how people and organizations work. Such advancements are now pushed forward by the rise of the Digital Twin paradigm applied to organizational processes. Advanced ways of managing and maintaining business processes come within reach as there is a Digital Twin of a business process - a virtual replica with real-time capabilities of a real process occurring in an organization. Combining business process models with real-time data and simulation capabilities promises to provide a new way to guide day-to-day organization activities. However, integrating Digital Twins and business processes is a non-trivial task, presenting numerous challenges and ambiguities. This manifesto paper aims to contribute to the current state of the art by clarifying the relationship between business processes and Digital Twins, identifying ongoing research and open challenges, thereby shedding light on and driving future exploration of this innovative interplay. © 2024, CC BY-NC-ND.

关键词： Virtual corporation

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Secured multi modal Biometric System : A Review 3

Secured Multi Modal Biometric System : A Review

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3rd International Conference on I-SmAC (IoT in Social, mobile, Analytics and Cloud), I-SmAC 2019

作者： Akulwar, Pooja Vijapur, Nataraj A. Sanjay Ghodawat Group of Institutions Computer Science and Engineering Department Atigre India KLE Dr. M. S. Sheshgiri College of Engg. Tech. Department of Electronics and Communications Belgaum India

ISBN: (纸本)9781728143651

multi biometrics is a significant and interesting research area. It is used in identifying individuals for security purposes and increasing security levels. multi modal biometric provides solution over unimodal biometric system. Various approaches and methods have been studied to improve the accuracy of identification. A state-of-the-art survey on Unimodal biometric limitations, need of multi modal biometrics, conventional methods for identification and different fusion levels are discussed. The integration of machine learning in biometrics is highlighted to improve the accuracy in identification process. The biometric features taken firstly are not similar when they are taken twice. Due to these features, usage of machine learning techniques like Neural Networks, fuzzy logic, evolutionary computing etc. has developed a great demand. © 2019 IEEE.

关键词： Biometrics

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Renewable Energy Based Grid Connected Battery Projects around the World—An Overview

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Journal of Energy and Power engineering 2019年第1期13卷 1-23页

作者： Nimat Shamim Anitha Sarah Subburaj Stephen B.Bayne Department of Electrical & Computer Engineering Texas Tech UniversityLubbock Texas 79409USA School of Engineering Computer Science and MathematicsWest Texas A&M UniversityCanyonTexas 79016USA

The environmental pollution,as well as gradual depletion of mineral resources has encouraged the world to move into renewable energy sources for generation of *** present,the cost of using renewable energy sources,such as sunshine and wind in electricity generation has significantly *** has led to higher penetration of renewable energy into the ***,both wind and solar energy photovoltaics are unpredictable energies which reduce the reliability and resiliency of the *** integration of battery energy storage system in the grid is one of the proficient solutions to the *** are numerous grid connected renewable energy based battery projects that have been deployed in different countries around the world for research,development and commercial *** review paper will discuss some of the projects based on the battery connected wind and solar energy power generation systems that can operate both in grid connected and grid independent *** projects discussed in this paper are selected based on the availability of *** battery energy storage system(BESS)incorporated in each of the project is found to increase the stability and performance of the grid by addressing the mismatch between power generation and the load of the grid created due to intermittent nature of renewable energy sources.

关键词： Battery technology grid connected battery projects power electronics solar wind

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The joint automated repository for various integrated simulations (JARVIS) for data-driven materials design

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npj Computational materials 2020年第1期6卷 234-246页

作者： Kamal Choudhary Kevin F.Garrity Andrew C.E.Reid Brian DeCost Adam J.Biacchi Angela R.Hight Walker Zachary Trautt Jason Hattrick-Simpers A.Gilad Kusne Andrea Centrone Albert Davydov Jie Jiang Ruth Pachter Gowoon Cheon Evan Reed Ankit Agrawal Xiaofeng Qian Vinit Sharma Houlong Zhuang Sergei V.Kalinin Bobby G.Sumpter Ghanshyam Pilania Pinar Acar Subhasish mandal Kristjan Haule David Vanderbilt Karin Rabe Francesca Tavazza Materials Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD 20899USA Theiss Research La JollaCA 92037USA Department of Chemistry and Biochemistry University of MarylandCollege ParkMD 20742USA Physical Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD 20899USA Materials and Manufacturing Directorate Air Force Research LaboratoryWright–Patterson Air Force BaseDaytonOH 45433USA Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA Department of Electrical and Computer Engineering Northwestern UniversityEvanstonIL 60208USA Department of Materials Science and Engineering Texas A&M UniversityTexasTX 77843USA Joint Institute for Computational Sciences University of TennesseeKnoxvilleTN 37996USA National Institute for Computational Sciences Oak Ridge National LaboratoryOak RidgeTN 37831USA School for Engineering of Matter Transport and Energy Arizona State UniversityTempeAZ 85287USA Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831USA Materials Science and Technology Division Los Alamos National LabLos AlamosNM 87545USA Department of Mechanical Engineering Virginia TechBlacksburgVA 24061USA Department of Physics and Astronomy Rutgers UniversityPiscatawayNJ 08901USA

The Joint Automated Repository for Various Integrated Simulations(JARVIS)is an integrated infrastructure to accelerate materials discovery and design using density functional theory(DFT),classical force-fields(FF),and machine learning(mL)*** is motivated by the materials Genome Initiative(mGI)principles of developing open-access databases and tools to reduce the cost and development time of materials discovery,optimization,and deployment.

关键词： automated JAR databases

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Extreme electrodynamics in time-varying media

arXiv

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arXiv 2025年

作者： Scalora, m. Vincenti, m.A. de Ceglia, D. Akozbek, N. Ferrera, m. Rizza, C. Alù, A. Litchinitser, N. Cojocaru, C. Trull, J. FCDD-AMT-MGR DEVCOM AvMC C. M. Bowden Research Center Redstone ArsenalAL35898-5000 United States Department of Information Engineering University of Brescia Brescia25123 Italy US Army Space & Missile Defense Command Tech Center Redstone ArsenalAL35898 United States Institute of Photonics and Quantum Sciences Heriot-Watt University SUPA EdinburghEH14 4AS United Kingdom Department of Physical and Chemical Sciences University of L’Aquila L’AquilaI-67100 Italy Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10016 United States Department of Electrical and Computer Engineering Duke University DurhamNC27708 United States Department of Physics Universitat Politècnica de Catalunya Barcelona Terrassa08222 Spain

Abrupt time variations of the properties of optical materials have been at the center of intense research efforts in recent years, with the prospect of enabling extreme wave transformations and of leveraging time as a degree of freedom for wave control. While the most viable approach to yield ultrafast variations of the optical material response is through optical pumping of nonlinear media, the complex dynamics in these systems are not yet fully understood. Here, as a relevant case study, we rigorously investigate the pump-probe dynamics in a 310nm-thick transparent conductive oxide etalon, using a weak 40 femtosecond probe and a pump that displays peak power densities in the TW/cm2 range with a duration of a few femtoseconds. We examine the pump-probe interaction using a hydrodynamic-maxwell approach that accounts for diffraction, self-focusing and -defocusing, self- and cross-phase modulation, probe gain, and linear and nonlinear material dispersion expanded in the perturbative regime up to 9th order for both pump and probe. By allowing the intricacies of the pump-probe interaction to proceed in time, we can also define an effective spatio-temporal permittivity for a more direct evaluation of the material ultra-broadband optical behavior. The reported results challenge the conventional modeling of this kind of problem, which has so far overlooked pump dynamics, simplistically assigning a local time-dependent refractive index to the probe that may be designed to fit the experimental data, but has no physical connection to the complex pump-probe interaction. Our approach unveils new dynamics, pointing towards the possibility to achieve extreme pulse compression into the attosecond range and nonlinear diffraction over deeply subwavelength propagation distances, thus opening a possible new path towards novel and cost-effective tools for integrated photonics and attosecond science. © 2025, CC BY-NC-ND.

关键词： Probes

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