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Publisher’s Note: “Skyrmionics—Computing and memory technologies based on topological excitations in magnets” [J. Appl. Phys. 130, 070908 (2021)]

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Journal of Applied Physics 2021年第11期130卷

作者： Hamed Vakili Jun-Wen Xu Wei Zhou Mohammad Nazmus Sakib Md Golam Morshed Timothy Hartnett Yassine Quessab Kai Litzius Chung T. Ma Samiran Ganguly Mircea R. Stan Prasanna V. Balachandran Geoffrey S. D. Beach S. Joseph Poon Andrew D. Kent Avik W. Ghosh 1Department of Physics University of Virginia Charlottesville Virginia 22904 USA 2Center for Quantum Phenomena Department of Physics New York University New York New York 10003 USA 3Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22904 USA 4Department of Materials Science and Engineering University of Virginia Charlottesville Virginia 22904 USA 5Center for Materials Science and Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA

This article was originally published online on 19 August 2021 with an error in the author list. The author list appears correct above. All online and printed v

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Efficient experimental quantum fingerprinting with wavelength division multiplexing

arXiv

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arXiv 2020年

作者： Zhong, Xiaoqing Xu, Feihu Lo, Hoi-Kwong Qian, Li Center for Quantum Information and Quantum Control Dept. of Physics University of Toronto TorontoONM5S 1A7 Canada Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics University of Science and Technology of China Hefei230026 China Center for Quantum Information and Quantum Control Dept. of Electrical & Computer Engineering University of Toronto TorontoONM5S 3G4 Canada

Quantum communication complexity studies the efficiency of information communication (that is, the minimum amount of communication required to achieve a certain task) using quantum states. One representative example is quantum fingerprinting, in which the simultaneous message passing model is considered and the minimum amount of communication could be exponentially smaller than the classical fingerprinting protocol. Experimental demonstrations based on a practical quantum fingerprinting protocol where coherent states are used to construct the fingerprints, have successfully shown the superiority of quantum fingerprinting. However, as a consequence of using coherent states, the communication time in this coherent quantum fingerprinting (CQF) protocol is increased. Moreover, the minimum amount of information communicated in these experimental demonstrations is largely limited by the dark counts of the single photon detectors. Here, we propose to enhance the performance of the existing CQF protocol through applying wavelength division multiplexing (WDM) and simultaneous detection of multiple wavelength channels. We show that the new WDM-CQF protocol can potentially reduce the communication time significantly. More importantly, with the same experimental parameters, the amount of communication is much reduced in the new scheme compared with the original CQF protocol. The more wavelength channels are used, the less communication is required by WDM-CQF protocol. We also perform a proof-of-concept experimental demonstration of the new WDM-CQF protocol with 6 wavelength channels. The experimental results further validate that the new scheme with WDM not only beats the classical protocol, but also reduces the amount of communication required by the original CQF protocol by more than half. Copyright © 2020, The Authors. All rights reserved.

关键词： Demonstrations

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Optimal resource allocation for delay minimization in NOMA-MEC networks

arXiv

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arXiv 2020年

作者： Fang, Fang Xu, Yanqing Ding, Zhiguo Shen, Chao Peng, Mugen Karagiannidis, George K. Department of Engineering Durham University DurhamDH1 3LE United Kingdom School of Electrical and Electronic Engineering University of Manchester M13 9PL United Kingdom State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China Group Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki54124 Greece

Multi-access edge computing (MEC) can enhance the computing capability of mobile devices, while non-orthogonal multiple access (NOMA) can provide high data rates. Combining these two strategies can effectively benefit the network with spectrum and energy efficiency. In this paper, we investigate the task delay minimization in multi-user NOMA-MEC networks, where multiple users can offload their tasks simultaneously through the same frequency band. We adopt the partial offloading policy, in which each user can partition its computation task into offloading and locally computing parts. We aim to minimize the task delay among users by optimizing their tasks partition ratios and offloading transmit power. The delay minimization problem is first formulated, and it is shown that it is a nonconvex one. By carefully investigating its structure, we transform the original problem into an equivalent quasi-convex. In this way, a bisection search iterative algorithm is proposed in order to achieve the minimum task delay. To reduce the complexity of the proposed algorithm and evaluate its optimality, we further derive closed-form expressions for the optimal task partition ratio and offloading power for the case of two-user NOMA-MEC networks. Simulations demonstrate the convergence and optimality of the proposed algorithm and the effectiveness of the closed-form analysis. Copyright © 2020, The Authors. All rights reserved.

关键词： Energy efficiency

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Comparator-based gene regulatory network designs for control of expression

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IFAC-PapersOnLine 2018年第19期51卷 38-41页

作者： Kazemi, J. Ozgoli, S. Ingalls, B.P. Advanced Control Systems Laboratory School of Electrical and Computer Engineering Tarbiat Modares University Tehran Iran Department of Applied Mathematics University of Waterloo WaterlooOntarioN2L 3G1 Canada

We present comparator-based gene network designs for feedback control of the concentration of gene products. Two gene circuit designs are proposed, each of which compares concentrations of an input transcription factor (the reference input) with the protein product of a target gene (the process output). These designs employ a genetic relay switch and a shifted subtractor as components of a discrete comparator circuit and a bistable comparator circuit, respectively. Numerical simulation results illustrate the potential effectiveness of the designed controllers. © 2018

关键词： Comparator circuits Comparators (optical) Feedback control Integrated circuit manufacture Transcription Gene circuits Gene networks Gene products Gene regulatory networks Process output Reference inputs Relay switches Synthetic biology

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Erratum: “Two-dimensional porous graphitic carbon nitride C6N7 monolayer: First-principles calculations” [Appl. Phys. Lett. 119, 142102 (2021)]

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Applied Physics Letters 2022年第18期120卷

作者： A. Bafekry M. Faraji M. M. Fadlallah I. Abdolhosseini Sarsari H. R. Jappor S. Fazeli M. Ghergherehchi 1Department of Radiation Application Shahid Beheshti University Tehran Iran 2Micro and Nanotechnology Graduate Program TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey 3Department of Physics Faculty of Science Benha University 13518 Benha Egypt 4Department of Physics Isfahan University of Technology Isfahan 84156-83111 Iran 5Department of Physics College of Education for Pure Sciences University of Babylon Hilla Iraq 6Department of Material Science and Engineering Sharif University of Technology PO Box 11155-9466 Tehran Iran 7Department of Electrical and Computer Engineering Sungkyunkwan University 16419 Suwon South Korea

The original article1 contains misprints in the values of the elastic parameters. The values of C11 = 258.6 GPa, C22 = 290.8 GPa, and C12 = 70.73 GPa and C13 =

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A review on security challenges and approaches in the cloud computing

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AIP Conference Proceedings 2020年第1期2290卷

作者： Elham Mohammed Thabit A. Alsaadi Sabah Mohammed Fayadh Ashwak Alabaichi 1Department of Computer Science College of Science University of Kerbala Karbala Iraq 2Department of Computer Systems AL Nassriyah Technical Institute Southern Technical University Thi-Qar Iraq 3Department of Biomedical engineering College of Engineering University of Kerbala Karbala Iraq

Cloud Computing is a model based on computing system which provides convenient and customizable services to the users for accessing to different cloud applications. It provides a way for storing and accessing cloud data from anywhere via connecting the cloud application utilizing internet. The cloud computing and its related safety problems is one of widely discussed concerns in today generation's research field. While numerous cloud security investigations are previously widespread, there residues a definite distance in properly identifying these issues and find the appropriate solutions. Some studies discuss the problems of virtualization and approach the target, while others talk about access control mechanisms, but what's missing is a standard framework which simultaneously extends the concept of cloud security and describes its specific requirements. In addition, countermeasures given in a survey must clearly illustrate the problem it deals with. This analysis paper took all of these elements into consideration so that the necessary areas were properly connected and a number of open issues were discussed in this area. This paper also reviews the most significant security techniques to data protection and cloud security in the cloud computing. Moreover, security techniques for data protection will be recommended in order to have enhanced security in cloud computing. It will concentrate primarily on issues related to data security and provides solutions.

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Decision support system for selection of food aid recipients using SAW method

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AIP Conference Proceedings 2022年第1期2453卷

作者： Victor Marudut Mulia Siregar Irmayanti Eva Julyanti Nurlina Ariani Hrp Maya Jannah Elviana Sagala Nancy Florida Siagian Haji Saediman Andini Dani Achmad Abdul Samad Arief 1Department of Computer Engineering Politeknik Bisnis Indonesia Indonesia 9Universitas Hasanuddin Makassar Indonesia 2Faculty of Science and Technology Universitas Labuhanbatu Indonesia 3Department of FKIP Universitas Labuhanbatu Indonesia 4Department of FKIP Universitas Labuhanbatu Indonesia 5Faculty of Law Universitas Labuhanbatu Indonesia 6Faculty of Law Universitas Labuhanbatu Indonesia 7Finance and Banking Department Politeknik Bisnis Indonesia Indonesia 8Department of Agribusiness Faculty of Agriculture Halu Oleo University Kendari Indonesia 10Universitas Fajar Indonesia

This research was conducted to overcome the problem of determining the recipients of non-cash food assistance in the village of Nagori Bayu Bagasan. Assistance in the form of non-cash food assistance is one of the efforts provided by the government to reduce the burden of spending on the poor. In the selection of the recipients of non-cash food assistance in the village of Nagori Bayu Bagasan, they still did not use a decision support system approach so that the recipients of the non-cash food assistance were not on target. To overcome this, a Decision Support System was designed using the SAW method to assist the selection of recipients of non-cash food aid assistance. This Decision Support System is designed with 5 criteria, namely employment, income, dependents, homeownership, and housing conditions. Through the application of the SAW method, the selection of the best non-cash food aid recipients is obtained from the results carried out by ranking (ranking). The results of the SPK SAW method in this study were obtained that, 5 samples of people who were eligible to receive non-cash food assistance were with priority values, including 85.5; 77.5; 72; 71; 67.

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Fast online reinforcement learning control using state-space dimensionality reduction

arXiv

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arXiv 2019年

作者： Sadamoto, Tomonori Chakrabortty, Aranya Imura, Jun-Ichi Department of Mechanical and Intelligent Systems Engineering Graduate School of Informatics and Engineering University of Electro Communications 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan Electrical and Computer Engineering North Carolina State University RaleighNC27695 United States Department of Systems and Control Engineering Graduate School of Engineering Tokyo Institute of Technology Oh-Okayama Meguro Tokyo2-12-1 Japan

Reinforcement Learning (RL) is an effective way of designing model-free linear quadratic regulator (LQR) controller for linear time-invariant (LTI) networks with unknown state-space models. However, when the network size is large, conventional RL can result in unacceptably long learning time. In this paper we resolve this problem by developing an alternative approach for RL-based LQR that combines dimensionality reduction with RL theory. The approach is to construct a compressed state vector by projecting the measured state through a projective matrix. This matrix is constructed from the state measurements, and can be viewed as an empirical controllability gramian that captures the level of redundancy in the controllability of the open-loop network model. Next, a RL-controller is learned using the reduced-dimensional state instead of the original state such that the resultant cost is close to the optimal LQR cost. Numerical benefits as well as the cyber-physical implementation benefits of the proposed approach are verified using illustrative examples including an example of wide-area control of the IEEE benchmark power system. Copyright © 2019, The Authors. All rights reserved.

关键词： controllers

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Erratum: “Carrier leakage via interface-roughness scattering bridges gap between theoretical and experimental internal efficiencies of quantum cascade lasers” [Appl. Phys. Lett. 117, 051101 (2020)]

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Applied Physics Letters 2020年第10期117卷

作者： C. Boyle K. M. Oresick J. D. Kirch Y. V. Flores L. J. Mawst D. Botez 1Department of Electrical and Computer Engineering University of Wisconsin Madison Wisconsin 53706 USA 2Material Science Center Philipps-Universität Marburg 35032 Marburg Germany

An error has been detected in the original paper.1 That is, Eq. (4) on page 051101-03,

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Experimental Demonstration of Quantum Fully Homomorphic Encryption with Application in a Two-Party Secure Protocol

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Physical Review X 2020年第1期10卷 011038-011038页

作者： W. K. Tham Hugo Ferretti Kent Bonsma-Fisher Aharon Brodutch Barry C. Sanders Aephraim M. Steinberg Stacey Jeffery Department of Physics and Center for Quantum Information and Quantum Control University of Toronto 60 St. George Street Toronto Ontario M5S 1A7 Canada The Edward S. Rogers Department of Electrical and Computer Engineering University of Toronto 10 Kings College Road Toronto Ontario M5S 3G4 Canada Institute for Quantum Science and Technology University of Calgary Alberta T2N 1N4 Canada Institute for Quantum Information and Matter California Institute of Technology Pasadena California 91125 USA Canadian Institute for Advanced Research Toronto Ontario M5G 1M1 Canada QuSoft and CWI Amsterdam 1098 XG Netherlands

A fully homomorphic encryption system hides data from unauthorized parties while still allowing them to perform computations on the encrypted data. Aside from the straightforward benefit of allowing users to delegate computations to a more powerful server without revealing their inputs, a fully homomorphic cryptosystem can be used as a building block in the construction of a number of cryptographic functionalities. Designing such a scheme remained an open problem until 2009, decades after the idea was first conceived, and the past few years have seen the generalization of this functionality to the world of quantum machines. Quantum schemes prior to the one implemented here were able to replicate some features in particular use cases often associated with homomorphic encryption but lacked other crucial properties, for example, relying on continual interaction to perform a computation or leaking information about the encrypted data. We present the first experimental realization of a quantum fully homomorphic encryption scheme. To demonstrate the versatility of a a quantum fully homomorphic encryption scheme, we further present a toy two-party secure computation task enabled by our scheme.

关键词： Photon pairs & parametric down-conversion Quantum cryptography Quantum gates Quantum information with atoms & light

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