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Error compensation of single-qubit gates in a surface-electrode ion trap using composite pulses

Physical Review A 2015年第6期92卷 060301(R)-060301(R)页

作者： Emily Mount Chingiz Kabytayev Stephen Crain Robin Harper So-Young Baek Geert Vrijsen Steven T. Flammia Kenneth R. Brown Peter Maunz Jungsang Kim Department of Electrical and Computer Engineering Duke University Durham North Carolina 27708 USA Schools of Chemistry and Biochemistry Computational Science and Engineering and Physics Georgia Institute of Technology Atlanta Georgia 30332 USA School of Physics University of Sydney Sydney New South Wales 2006 Australia Sandia National Laboratories Albuquerque New Mexico 87123 USA

The fidelity of laser-driven quantum logic operations on trapped ion qubits tend to be lower than microwave-driven logic operations due to the difficulty of stabilizing the driving fields at the ion location. Through stabilization of the driving optical fields and use of composite pulse sequences, we demonstrate high-fidelity single-qubit gates for the hyperfine qubit of a Yb+171 ion trapped in a microfabricated surface-electrode ion trap. Gate error is characterized using a randomized benchmarking protocol and an average error per randomized Clifford group gate of 3.6(3)×10−4 is measured. We also report experimental realization of palindromic pulse sequences that scale efficiently in sequence length.

关键词： composite pulse MICROWAVE logical operation RANDOMISING Ions Surgery Sequences Ion Trap Formal logic Fidelity Automobile driving high fidelity gates

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Corrigendum: 1D versus 3D quantum confinement in 1–5 nm ZnO nanoparticle agglomerations for application in charge-trapping memory devices (2016 Nanotechnology 27 275205)

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Nanotechnology 2016年第41期27卷

作者： Nazek El-Atab Ammar Nayfeh Institute Center for Microsystems—iMicro Department of Electrical Engineering and Computer Science (EECS) Masdar Institute of Science and Technology Abu Dhabi United Arab Emirates

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Physics-based compact modeling of charge transport in nanoscale electronic devices

Physics-based compact modeling of charge transport in nanosc...

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International Electron Devices Meeting (IEDM)

作者： Shaloo Rakheja Dimitri Antoniadis Department of Electrical and Computer Engineering New York University Brooklyn NY Microsystems Technology Laboratories Massachusetts Institute of Technology Cambridge MA

Physics-based compact models of transistors play two complementary roles. First, they establish an analytical mathematical description of the device, which helps interpret measurements or detailed simulations and make predictions; second, they form the basis of models used in circuit simulators. Historically, as Si MOSFETs matured, the value of compact models in understanding devices, which was preeminent fifty years ago when such models were first developed, diminished and "compact models" became synonymous with circuit simulation models with the emphasis shifting to the faithful reproduction of fitted data, often at the expense of the solid physics underpinnings of at least some of the model equations and parameters. More recently, as silicon MOSFETs started approaching quasi-ballistic (QB) operation and new channel materials have emerged, interest has shifted back to physics-based models for exploring the limits of nanoscale FET performance [1-2]. In this paper, we argue that the key to the usefulness of such physics-based compact models is strict minimization of the number of model parameters, while still maintaining the capability to embed the model in a circuit simulator. We do this by using the VS compact model [3] for FETs and its adaptation to materials beyond silicon as example. While originally developed for silicon nanotransistors, the MIT Virtual Source (MVS) model has evolved considerably to describe transport in a variety of channel materials (carbon nanotubes, graphene, GaN, InGaAs) and device topologies (bulk-Si, ETSOI MOSFETs, III-V and III-N HEMTs.) With only a limited number of parameters, most of which are physical and can be extracted through device characterization, the MVS model is especially attractive for test-driving new devices in a relatively straightforward manner and also for technology benchmarking.

关键词： Integrated circuit modeling Mathematical model Data models Capacitance Adaptation models Computational modeling HEMTs

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Photonic analog-to-digital conversion scheme using an array of optical modulators

Photonic analog-to-digital conversion scheme using an array ...

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Optoelectronics Global Conference (OGC)

作者： Hayk Gevorgyan Anatol Khilo Department of Electrical Engineering and Computer Science Institute Center for Microsystems Masdar Institute of Science and Technology Abu Dhabi UAE

A novel scheme of an optically sampled, electronically quantized wavelength-demultiplexed analog-to-digital converter is proposed. The scheme is simple, energy efficient, tolerant to optical crosstalk, and fully suita... 详细信息

关键词： Modulation Optical crosstalk Photonics Optical resonators Optical pulses RF signals Silicon

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MoS2 U-shape MOSFET with 10 nm channel length and poly-Si source/drain serving as seed for full wafer CVD MoS2 availability

MoS2 U-shape MOSFET with 10 nm channel length and poly-Si so...

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Symposium on VLSI technology

作者： Kai-Shin Li Bo-Wei Wu Lain-Jong Li Ming-Yang Li Chia-Chin Kevin Cheng Cho-Lun Hsu Chang-Hsien Lin Yi-Ju Chen Chun-Chi Chen Chien-Ting Wu Min-Cheng Chen Jia-Min Shieh Wen-Kuan Yeh Yu-Lun Chueh Fu-Liang Yang Chenming Hu National Nano Device Laboratories National Applied Research Laboratories Hsinchu Taiwan Dept. of Material Science and Engineering National Tsing Hua University Hsinchu Taiwan Physical Sci. and Eng. King Abdullah University of Sci. and Technology Kingdom of Saudi Arabia Research Center for Applied Sci. Academia Sinica Taiwan Department of Material Science and Engineering National Chiao Tung University Hsinchu Taiwan Dept. of Electrical Eng. and Computer Sci. University of California Berkeley USA

ISBN: (纸本)9781509006397

A U-shape MoS 2 pMOSFET with 10nm channel and poly-Si source/drain is demonstrated. The fabrication process is simple. Because the Si S/D serves as the nucleation seed for CVD MoS 2 deposition, thin MoS 2 is well deposited in the channel region any where over the fully scale oxide coated Si wafer. This is a big step forward toward a low cost multi-layer stacked TMD IC technology.

关键词： MOSFET circuits Films Logic gates Annealing Silicon Etching laboratories

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25th Annual Computational Neuroscience Meeting CNS-2016, Seogwipo City, South Korea, July 2-7, 2016 Abstracts

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BMC NEUROscience 2016年第1期17卷 1-112页

作者： [Anonymous] Computational Neurobiology Laboratory The Salk Institute for Biological Studies San Diego USA UNIC CNRS Gif sur Yvette France The European Institute for Theoretical Neuroscience (EITN) Paris France ATR Computational Neuroscience Laboratories Kyoto Japan Krembil Research Institute University Health Network Toronto Canada Department of Physiology University of Toronto Toronto Canada Department of Medicine (Neurology) University of Toronto Toronto Canada Department of Physics University of New Hampshire Durham USA Department of Neurophysiology Nencki Institute of Experimental Biology Warsaw Poland Department of Theory Wigner Research Centre for Physics of the Hungarian Academy of Sciences Budapest Hungary Department of Mathematical Sciences KAIST Daejoen Republic of Korea Department of Mathematics University of Houston Houston USA Department of Biochemistry & Cell Biology and Institute of Biosciences and Bioengineering Rice University Houston USA Department of Biology and Biochemistry University of Houston Houston USA Grupo de Neurocomputación Biológica Dpto. de Ingeniería Informática Escuela Politécnica Superior Universidad Autónoma de Madrid Madrid Spain Department of Biological Sciences University of Southern California Los Angeles USA Center for Neuroscience Korea Institute of Science and Technology Seoul South Korea Department of Neurology Albert Einstein College of Medicine Bronx USA Center for Neuroscience KIST Seoul South Korea Department of Neuroscience University of Science and Technology Daejon South Korea Systems Neuroscience Group QIMR Berghofer Medical Research Institute Herston Australia Department of Psychology Yonsei University Seoul South Korea Department of Psychiatry Kyung Hee University Hospital at Gangdong Seoul South Korea Department of Psychiatry Veterans Administration Boston Healthcare System and Harvard Medical School Brockton USA Department of Electrical and Electronic Engineering The University of Melbourne Parkvil

A1 Functional advantages of cell-type heterogeneity in neural circuits Tatyana O. Sharpee A2 Mesoscopic modeling of propagating waves in visual cortex Alain Destexhe A3 Dynamics and biomarkers of mental disorders Mitsuo Kawato F1 Precise recruitment of spiking output at theta frequencies requires dendritic h-channels in multi-compartment models of oriens-lacunosum/moleculare hippocampal interneurons Vladislav Sekulić, Frances K. Skinner F2 Kernel methods in reconstruction of current sources from extracellular potentials for single cells and the whole brains Daniel K. Wójcik, Chaitanya Chintaluri, Dorottya Cserpán, Zoltán Somogyvári F3 The synchronized periods depend on intracellular transcriptional repression mechanisms in circadian clocks. Jae Kyoung Kim, Zachary P. Kilpatrick, Matthew R. Bennett, Kresimir Josić O1 Assessing irregularity and coordination of spiking-bursting rhythms in central pattern generators Irene Elices, David Arroyo, Rafael Levi, Francisco B. Rodriguez, Pablo Varona O2 Regulation of top-down processing by cortically-projecting parvalbumin positive neurons in basal forebrain Eunjin Hwang, Bowon Kim, Hio-Been Han, Tae Kim, James T. McKenna, Ritchie E. Brown, Robert W. McCarley, Jee Hyun Choi O3 Modeling auditory stream segregation, build-up and bistability James Rankin, Pamela Osborn Popp, John Rinzel O4 Strong competition between tonotopic neural ensembles explains pitch-related dynamics of auditory cortex evoked fields Alejandro Tabas, André Rupp, Emili Balaguer-Ballester O5 A simple model of retinal response to multi-electrode stimulation Matias I. Maturana, David B. Grayden, Shaun L. Cloherty, Tatiana Kameneva, Michael R. Ibbotson, Hamish Meffin O6 Noise correlations in V4 area correlate with behavioral performance in visual discrimination task Veronika Koren, Timm Lochmann, Valentin Dragoi, Klaus Obermayer O7 Input-location dependent gain modulation in cerebellar nucleus neurons Maria Psarrou, Maria Schilstra, Neil Davey, Benjamin Torben-Ni

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From categorical to numerical: Multiple transitive distance learning and embedding

From categorical to numerical: Multiple transitive distance ...

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SIAM International Conference on Data Mining 2015, SDM 2015

作者： Zhang, Kai Wang, Qiaojun Chen, Zhengzhang Marsic, Ivan Kumar, Vipin Jiang, Guofei Zhang, Jie School of Computer Science Southwest Petroleum University Chengdu Sichuan Province610500 China Institute of Data Science and Technology Alibaba Group SeattleWA98101 United States Department of Electrical and Computer Engineering Rutger-s the State University of New Jersey NJ08854 United States NEC Laboratories America Inc. PrincetonNJ08540 United States Department of Electrical Engineering and Computer Science Northwestern University EvanstonIL60208 United States Department of Computer Science and Engineering University of Minnesota MinneapolisMN55455 United States Center for Computational Systems Biology Fudan University Shanghai200433 China

ISBN: (纸本)9781510811522

Categorical data are ubiquitous in real-world databases. However, due to the lack of an intrinsic proximity measure, many powerful algorithms for numerical data analysis may not work well on their categorical counterparts, making it a bottleneck in practical applications. In this paper, we propose a novel method to transform categorical data to numerical representations, so that abundant numerical learning methods can be exploited in categorical data mining. Our key idea is to learn a pairwise dissimilarity among categorical symbol-s, henceforth a continuous embedding, which can then be used for subsequent numerical treatment. There are two important criteria for learning the dissimilarities. First, it should capture the important "transitivity" which has shown to be particularly useful in measuring the proximity relation in categorical data. Second, the pairwise sample geometry arising from the learned symbol distances should be maximally consistent with prior knowledge (e.g., class labels) to obtain a good generalization performance. We achieve them through multiple transitive distance learning and embedding. Encouraging results are observed on a number of benchmark classification tasks against state-of-the-art. Copyright © SIAM.

关键词： Distance education

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Space QUEST mission proposal: Experimentally testing decoherence due to gravity

arXiv

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arXiv 2017年

作者： Joshi, Siddarth Koduru Pienaar, Jacques Ralph, Timothy C. Cacciapuoti, Luigi McCutcheon, Will Rarity, John Giggenbach, Dirk Lim, Jin Gyu Makarov, Vadim Fuentes, Ivette Scheidl, Thomas Beckert, Erik Bourennane, Mohamed Bruschi, David Edward Cabello, Adan Capmany, Jose Carrasco-Casado, Alberto Diamanti, Eleni Dusek, Miloslav Elser, Dominique Gulinatti, Angelo Hadfield, Robert H. Jennewein, Thomas Kaltenbaek, Rainer Krainak, Michael A. Lo, Hoi-Kwong Marquardt, Christoph Milburn, Gerard Peev, Momtchil Poppe, Andreas Pruneri, Valerio Renner, Renato Salomon, Christophe Skaar, Johannes Solomos, Nikolaos Stipčević, Mario Torres, Juan P. Toyoshima, Morio Villoresi, Paolo Walmsley, Ian Weihs, Gregor Weinfurter, Harald Zeilinger, Anton Zukowski, Marek Ursin, Rupert Institute for Quantum Optics and Quantum Information Austrian Academy of Sciences Boltzmanngasse 3 ViennaA-1090 Austria Centre for Quantum Computation & Communication Technology Department of Physics University of Queensland St LuciaQLD4072 Australia European Space Agency Keplerlaan 1 - P.O. Box 299 AG Noordwijk ZH2200 Netherlands Department of Electrical and Electronic Engineering University of Bristol Merchant Venturers Building Woodland Road BristolBS8 1UB United Kingdom German Aerospace Center Institute of Communications and Navigation Muenchner Strasse 20 Wessling82234 Germany Institute for Quantum Computing Department of Electrical and Computer Engineering University of Waterloo WaterlooONN2L 3G1 Canada Institute for Quantum Computing Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada Precision Engineering Department Fraunhofer IOF Albert-Einstein-Straße 7 Jena07745 Germany Physics department Stockholm University Albanova universitetscentrum Universitetsvägen 10 Stockholm114 18 Sweden York Centre for Quantum Technologies Department of Physics University of York HeslingtonYO10 5DD United Kingdom University of Seville SevillaE-41012 Spain iTEAM Research Institute Universitat Politcnica de Valencia Valencia46022 Spain 4-2-1 Nukui-Kitamachi Koganei Tokyo184-8795 Japan CNRS Universite Pierre et Marie Curie Paris75005 France Department of Optics Faculty of Science Palacky University 17. Iistopadu 12 Olomouc772 00 Czech Republic Max Planck Institute for the Science of Light Bldg. 24 Günther-Scharowsky Str. 1 ErlangenD-91058 Germany Piazza Leonardo da Vinci 32 Milano20133 Italy School of Engineering University of Glasgow GlasgowG12 8LT United Kingdom Vienna Center of Quantum Science and Technology Faculty of Physics University of Vienna Boltzmanngasse 5 ViennaA-1090 Austria NASA Goddard Space Flight Center GreenbeltMD20771 United States Center for Quantum Information and Quantum Con

Models of quantum systems on curved space-times lack sufficient experimental verification. Some speculative theories suggest that quantum properties, such as entanglement, may exhibit entirely different behavior to purely classical systems. By measuring this effect or lack thereof, we can test the hypotheses behind several such models. For instance, as predicted by Ralph and coworkers [T C Ralph, G J Milburn, and T Downes, Phys. Rev. A, 79(2):22121, 2009;T C Ralph and J Pienaar, New Journal of Physics, 16(8):85008, 2014], a bipartite entangled system could decohere if each particle traversed through a different gravitational field gradient. We propose to study this effect in a ground to space uplink scenario. We extend the above theoretical predictions of Ralph and coworkers and discuss the scientific consequences of detecting/failing to detect the predicted gravitational decoherence. We present a detailed mission design of the European Space Agency's (ESA) Space QUEST (Space - Quantum Entanglement Space Test) mission, and study the feasibility of the mission scheme. Copyright © 2017, The Authors. All rights reserved.

关键词： Quantum entanglement

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Real-time Middle Wave Infrared Aerial Image Capturing and Stitching System for Vegetation Observation

Real-time Middle Wave Infrared Aerial Image Capturing and St...

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IEEE International Instrumentation and Measurement technology Conference

作者： Chun-Fu Lin Sheng-Fuu Lin Wen-Jyi Hwang Yung-Hsiang Chen Chi-Hung Hwang Instrument Technology Research Center National Applied Research Laboratories Taiwan Republic of China Institute of Electrical Control Engineering National Chiao Tung University Taiwan Republic of China Department of Computer Science and Information Engineering National Taiwan Normal University Taiwan Republic of China

ISBN: (纸本)9781479961153

Over the last decades, several studies have demonstrated the reflectance effectiveness of middle wave infrared (MWIR) for discriminating among different types of vegetation, and estimating the total and leaf biomass of several forest ecosystems. Therefore, a MWIR aerial image capturing system for vegetation observation is urgently required. Furthermore, stitching those MWIR aerial images together is necessary for a panorama of the region of interest (ROI). Most traditional stitching algorithms for aerial images are designed for visible images, and are not suitable for infrared images that are noisy, blurry, or lack detail. In this paper, a novel real-time MWIR aerial image capturing and stitching system for vegetation observation is proposed. The proposed stitching algorithm for aerial infrared images improved from scale invariant feature transform (SIFT) and random M-least square can find a sufficient number of feature points easily and perform rapid calculations. Therefore, the proposed MWIR aerial image capturing and stitching system for vegetation observation can operate in real time.

关键词： real-time MWIR capturing system stitching

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Potential predictability of vehicular staying time for large-scale Urban Environment

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IEEE Transactions on Vehicular technology 2014年第1期63卷 322-333页

作者： Li, Yong Ren, Wenyu Jin, Depeng Hui, Pan Zeng, Lieguang Wu, Dapeng State Key Laboratory on Microwave and Digital Communications Tsinghua National Laboratory for Information Science and Technology Department of Electronic Engineering Beijing 100084 China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong Hong Kong Telekom Innovation Laboratories Berlin 10587 Germany Department of Electrical and Computer Engineering University of Florida Gainesville FL 32611-6130 United States

The newly emerged vehicular communication network is seen as a key technology for solving increasingly serious vehicular traffic congestion and improving road safety. New applications of vehicular networks are also emerging at the same time. Predicting vehicular staying time is vital to both solving the vehicular system problem and building efficient vehicular networking. How much the vehicular staying duration of visits to different areas can be predicted is still an open and unsolved problem. In this paper, we use real vehicular traces in Beijing and Shanghai to explore the limit of predictability of the vehicular visiting time in different areas in large cities, and we analyze the impact of different precision and slot time on predictability. We conclude that using a proper time slot is an efficient way of prediction, and a higher predictability can be achieved if the requirement for precision is reduced. Among all the cases that we studied, we find the predictability to be 76.3% for Beijing and 82.5% for Shanghai in the case with the smallest slot time and reasonable requirements for precision. © 2013 IEEE.

关键词： Forecasting

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