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Directional emission of a readout resonator for qubit measurement

Physical Review applied 2024年第3期22卷 034035页

作者： Alec Yen Yufeng Ye Kaidong Peng Jennifer Wang Gregory Cunningham Michael Gingras Bethany M. Niedzielski Hannah Stickler Kyle Serniak Mollie E. Schwartz Kevin P. O’Brien Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Harvard John A. Paulson School of Engineering and Applied Sciences Lexington Massachusetts 02421 USA

We propose and demonstrate transmission-based dispersive readout of a superconducting qubit using an all-pass resonator, which preferentially emits readout photons toward the output. This is in contrast to typical readout schemes, which intentionally mismatch the feedline at one end so that the readout signal preferentially decays toward the output. We show that this intentional mismatch creates scaling challenges, including larger spread of effective resonator linewidths due to nonideal impedance environments and added infrastructure for impedance matching. A future architecture using multiplexed all-pass readout resonators would avoid the need for intentional mismatch and potentially improve the scaling prospects of quantum computers. As a proof-of-concept demonstration of “all-pass readout,” we design and fabricate an all-pass readout resonator that demonstrates insertion loss below 1.17 dB at the readout frequency and a maximum insertion loss of 1.53 dB across its full bandwidth for the lowest three states of a transmon qubit. We demonstrate qubit readout with an average single-shot fidelity of 98.1% in 600 ns; to assess the effect of larger dispersive shift, we implement a shelving protocol and achieve a fidelity of 99.0% in 300 ns.

关键词： Circuit quantum electrodynamics Optoelectronics Quantum error correction Quantum information with solid state qubits Quantum measurements Superconducting quantum optics Superconducting devices Microwave techniques

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Differential and Linear Cryptanalysis of IVLBC via MILP Modeling 16

Differential and Linear Cryptanalysis of IVLBC via MILP Mode...

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16th International Conference on Information Security and Cryptology, ISCTURKEY 2023

作者： Ilter, Murat Burhan Aydin Selcuk, Ali Middle East Technical University Institute of Applied Mathematics Ankara Turkey Aselsan Inc. Ankara Turkey Tobb Univ. of Economics and Tech. Department of Computer Engineering Ankara Turkey

ISBN: (纸本)9798350393996

Involutive Lightweight Block Cipher (IVLBC) is a recently proposed SPN-type block cipher. The intended platform for this cipher is the Internet of Things (IoT), and its performance is promising for both software and hardware. Preliminary differential and linear cryptanalysis are conducted via Mixed-Integer Linear Programming (MILP), an automated tool in the design paper. In this paper, we employ the MILP approach to identify the best linear and differential characteristics of IVLBC. For differential cryptanalysis, we discover a characteristic with a probability of 2-46 over 7 rounds of IVLBC, while in linear cryptanalysis, we identify a characteristic with a bias of 2-24, again for 7 rounds of the cipher. These results provide the best single-key differential and linear distinguishers of this cipher in the literature. © 2023 IEEE.

关键词： Internet of things

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Free-electron crystals for enhanced X-ray radiation

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Light(Science & Applications) 2024年第7期13卷 1299-1309页

作者： Lee Wei Wesley Wong Xihang Shi Aviv Karnieli Jeremy Lim Suraj Kumar Sergio Carbajo Ido Kaminer Liang Jie Wong School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore. Solid State Institute and Faculty of Electrical and Computer Engineering Technion–Israel Institute of TechnologyHaifa 3200003Israel. School of Electrical Engineering Fleischman Faculty of EngineeringTel Aviv UniversityTel Aviv 69978Israel Department of Applied Physics Stanford UniversityStanfordCA 94305USA. Science Mathematics and TechnologySingapore University of Technology and Design8 Somapah RoadSingapore 487372Singapore. Electrical and Computer Engineering Department UCLA420 WestwoodLos AngelesCA 90095USA. Physics and Astronomy Department UCLA475 Portola PlazaLos AngelesCA 90095USA. SLAC National Accelerator Laboratory Stanford University2575 Sand Hill RoadMenlo ParkCA 94025USA

Bremsstrahlung—the spontaneous emission of broadband radiation from free electrons that are deflected by atomic nuclei—contributes to the majority of X-rays emitted from X-ray tubes and used in applications ranging from medical imaging to semiconductor chip ***,we show that the bremsstrahlung intensity can be enhanced significantly—by more than three orders of magnitude—through shaping the electron wavefunction to periodically overlap with atoms in crystalline ***,we show how to shape the bremsstrahlung X-ray emission pattern into arbitrary angular emission profiles for purposes such as unidirectionality and ***,we find that these enhancements and shaped emission profiles cannot be attributed solely to the spatial overlap between the electron probability distribution and the atomic centers,as predicted by the paraxial and nonrecoil theory for free electron light *** work highlights an unprecedented regime of free electron light emission where electron waveshaping provides multi-dimensional control over practical radiation processes like *** results pave the way towards greater versatility in table-top X-ray sources and improved fundamental understanding of quantum electron-light interactions.

关键词： overlap attributed arbitrary

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Securing Blockchain based Supply Chain in Agriculture using Isolated Forests with Local Outlier Factor for Anomalies Detection 4

Securing Blockchain based Supply Chain in Agriculture using ...

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4th IEEE International Conference on Mobile Networks and Wireless Communications, ICMNWC 2024

作者： Padmavathi, A. Hassan, Muntather Muhsin Singh, Jashanpreet Vinola, F. Anitha Florence Saranya, N. Naga Saveetha College of Liberal Arts and Sciences Simats Department of Computer Science Chennai India College of Technical Engineering The Islamic University Department of Computers Techniques Engineering Najaf Iraq University Centre for Research & Development Chandigarh University Mohali India New Prince Shri Bhavani College of Engineering and Technology Department of Mathematics Chennai India Saveetha Liberal Arts and Sciences Simats Department of Computer Applications Chennai India

ISBN: (纸本)9798350352931

In recent days, the agriculture supply chain has transformed from a localized, autonomous system to a complex, globally interconnected network of diverse stakeholders, influencing every stage of food production and delivery to consumers. However, the existing Random Forest (RF) utilized for the anomaly detection, but it has high computational complexity. Hence, this research proposes an Isolated Forest with Local Outlier Factor (IF-LOF) for agriculture supply chain anomalies detection. This method uses real-time data collected from Device Network Logs (DNL) and the collected data is secured by utilizing block chain mechanisms. Then, the smart contracts block the suspicious IP address occurrence from the data, which is given by oracle database. Next, min-max normalization technique is utilized to preprocess the secured data and IF-LOF is introduced to detect anomalies by selecting random samples along with threshold value. When the LOF value is less than the value of threshold, then the anomalies are present in data otherwise not. As per the results, the proposed IF-LOF approach offered outperforming results in terms of accuracy (99.73%), precision (97.95%), recall (98.47%) and F1-score (97.32%) respectively. © 2024 IEEE.

关键词： agriculture supply chain device network logs internet protocol isolated forests local outlier factor

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Convex Optimization Boundary-Control Policies for Stability and Invariance of Traffic Flow Dynamics

arXiv

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arXiv 2025年

作者： Chiri, Maria Teresa Guglielmi, Roberto Notomista, Gennaro Department of Mathematics and Statistics Queen’s University KingstonON Canada Department of Applied Mathematics University of Waterloo ON Canada Department of Electrical and Computer Engineering University of Waterloo WaterlooON Canada

In this letter we propose an optimization-based boundary controller for traffic flow dynamics capable of achieving both stability and invariance conditions. The approach is based on the definition of Boundary Control Barrier Functionals (BCBFal), from which sets of invariance-preserving boundary controllers are derived. In combination with sets of stabilizing controllers, we reformulate the problem as a convex optimization program solved at each point in time to synthesize the boundary control inputs. Sufficient conditions for the existence of optimal controllers are derived in the case of traffic flow models with stability and invariance conditions. Copyright © 2025, The Authors. All rights reserved.

关键词： Convex optimization

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Set-based Particle Swarm Optimization for Data Clustering: Comparison and Analysis of Control Parameters 23

Set-based Particle Swarm Optimization for Data Clustering: C...

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7th International Conference on Intelligent Systems, Metaheuristics and Swarm Intelligence, ISMSI 2023

作者： de Wet, Rijk Marius Engelbrecht, Andries Department of Industrial Engineering Stellenbosch University Stellenbosch South Africa Computer Science Division Stellenbosch University Stellenbosch South Africa Center for Applied Mathematics and Bioinformatics Gulf University for Science and Technology Kuwait

ISBN: (纸本)9781450399920

Data clustering is a highly studied field of data science and computational intelligence. Population-based algorithms such as particle swarm optimization (PSO) have shown to be effective at data clustering. Set-based particle swarm optimization (SBPSO) is a generic set-based PSO variant that has shown promise in clustering stationary and non-stationary data. In this paper, SBPSO is used to cluster fifteen datasets with diverse characteristics. The clustering ability of SBPSO is compared in depth to the performance of six other tuned clustering algorithms. A sensitivity analysis of the SBPSO control parameters is performed to determine the effect that variation in these control parameters have on swarm diversity and other measures. SBPSO ranked third from among the algorithms evaluated and proved a viable clustering algorithm. A trade-off between swarm diversity and clustering ability was discovered, and the control parameters that control this trade-off were determined. © 2023 Copyright held by the owner/author(s). Publication rights licensed to ACM.

关键词： Sensitivity analysis

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research on the Application of Natural Language Processing Technology in Combating Cyber Violence

Research on the Application of Natural Language Processing T...

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computer Applications and Information Technology (ISCAIT), International Symposium on

作者： Haodan Qin Ruijun Zhang Zeyu Wang Hui Wang Department of Mathematics and Computer Engineering Ordos University of Applied Technology Kangbashe Ordos Inner Mongolia Autonomous Region China

ISBN: (数字)9798331542856

ISBN: (纸本)9798331542863

This study addresses the contemporary issue of cyber violence by developing a malicious content filtering algorithm to enhance online environmental health and safety. Leveraging comprehensive natural language processing (NLP) techniques, the research focuses on capturing implicit meanings and contextual associations in harmful speech through a cross-platform, multilingual algorithm design. The proposed system aims to achieve precise identification and effective blocking of toxic content across social media platforms, news comment sections, and forum discussions. By accommodating diverse linguistic and cultural contexts, the solution seeks to significantly reduce the dissemination and societal impact of malicious discourse, ultimately contributing to a more harmonious and equitable digital ecosystem.

关键词： Social networking (online) Law Ecosystems Text categorization Filtering algorithms Particle measurements Natural language processing Multilingual Speech processing Information technology

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Human- Robot Interface for Teleoperated Robotized Planetary Sample Collection and Assembly

Human- Robot Interface for Teleoperated Robotized Planetary ...

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IEEE Metrology for Aerospace

作者： Lorenzo Pagliara Vincenzo Petrone Enrico Ferrentino Pasquale Chiacchio Department of Computer Engineering Electrical Engineering and Applied Mathematics (DIEM) University of Salerno Fisciano Italy

As human space exploration evolves toward longer voyages farther from our home planet, in-situ resource utilization (ISRU) becomes increasingly important. Haptic teleoperations are one of the technologies by which such activities can be carried out remotely by humans, whose expertise is still necessary for complex activities. In order to perform precision tasks with effectiveness, the operator must experience ease of use and accuracy. The same features are demanded to reduce the complexity of the training procedures and the associated learning time for operators without a specific background in robotic teleoperations. Haptic teleoperation systems, that allow for a natural feeling of forces, need to cope with the trade-off between accurate movements and workspace extension. Clearly, both of them are required for typical ISRU tasks. In this work, we develop a new concept of operations and suitable human-robot interfaces to achieve sample collection and assembly with ease of use and accuracy. In the proposed operational concept, the teleoperation space is extended by executing automated trajectories, offline planned at the control station. In three different experimental scenarios, we validate the end-to-end system involving the control station and the robotic asset, by assessing the contribution of haptics to mission success, the system robustness to consistent delays, and the ease of training new operators.

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Preventing Pressure Oscillations Does Not Fix Local Linear Stability Issues of Entropy-Based Split-Form High-Order Schemes

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Communications on applied mathematics and Computation 2022年第3期4卷 880-903页

作者： Hendrik Ranocha Gregor J.Gassner Applied Mathematics Münster University of Münster48149 MünsterGermany Computer Electrical and Mathematical Science and Engineering(CEMSE)Division King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Department of Mathematics and Computer Science Center for Data and Simulation ScienceUniversity of CologneCologneGermany

Recently,it was discovered that the entropy-conserving/dissipative high-order split-form discontinuous Galerkin discretizations have robustness issues when trying to solve the sim-ple density wave propagation example for the compressible Euler *** issue is related to missing local linear stability,i.e.,the stability of the discretization towards per-turbations added to a stable base *** is strongly related to an anti-diffusion mech-anism,that is inherent in entropy-conserving two-point fluxes,which are a key ingredi-ent for the high-order discontinuous Galerkin *** this paper,we investigate if pressure equilibrium preservation is a remedy to these recently found local linear stability issues of entropy-conservative/dissipative high-order split-form discontinuous Galerkin methods for the compressible Euler *** equilibrium preservation describes the property of a discretization to keep pressure and velocity constant for pure density wave *** present the full theoretical derivation,analysis,and show corresponding numerical results to underline our *** addition,we characterize numerical fluxes for the Euler equations that are entropy-conservative,kinetic-energy-preserving,pressure-equilibrium-preserving,and have a density flux that does not depend on the *** source code to reproduce all numerical experiments presented in this article is available online(https://***/10.5281/zenodo.4054366).

关键词： Entropy conservation Kinetic energy preservation Pressure equilibrium preservation Compressible Euler equations Local linear stability Summation-by-parts

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Matrix Structure of Classical Z2×Z2 Graded Lie Algebras

Matrix Structure of Classical Z2×Z2 Graded Lie Algebras

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International Workshop on Lie Theory and Its Applications in Physics, LT 2023

作者： Stoilova, N.I. Van der Jeugt, J. Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Boul. Tsarigradsko Chaussee 72 Sofia1784 Bulgaria Department of Applied Mathematics Computer Science and Statistics Ghent University Krijgslaan 281-S9 Gent9000 Belgium

ISBN: (纸本)9789819764525

A Z2×Z2-graded Lie algebra g is a Z2×Z2-graded algebra g with a bracket [[·,·]] that satisfies certain graded versions of the symmetry and Jacobi identity. In particular, despite the common terminology, g is not a Lie algebra. We construct classes of Z2×Z2-graded Lie algebras corresponding to the classical Lie algebras, in terms of their defining matrices. For the Z2×Z2-graded Lie algebra of type A, the construction coincides with the previously known class. For the Z2×Z2-graded Lie algebra of type B, C and D our construction is new and gives rise to interesting defining matrices closely related to the classical ones but undoubtedly different. We also give some examples and possible applications to parastatistics. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Matrix algebra

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