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Folding State within a Hysteresis Loop: Hidden Multistability in Nonlinear Physical Systems

Physical Review Letters 2024年第13期132卷 137201-137201页

作者： Meng-Xia Bi Huawei Fan Xiao-Hong Yan Ying-Cheng Lai School of Science Xi’an University of Posts and Telecommunications Xi’an 710121 China School of Material Science and Engineering Jiangsu University Zhenjiang 212013 China School of Electrical Computer and Energy Engineering Arizona State University Tempe Arizona 85287 USA Department of Physics Arizona State University Tempe Arizona 85287 USA

Identifying hidden states in nonlinear physical systems that evade direct experimental detection is important as disturbances and noises can place the system in a hidden state with detrimental consequences. We study a cavity magnonic system whose main physics is photon and magnon Kerr effects. Sweeping a bifurcation parameter in numerical experiments (as would be done in actual experiments) leads to a hysteresis loop with two distinct stable steady states, but analytic calculation gives a third folded steady state “hidden” in the loop, which gives rise to the phenomenon of hidden multistability. We propose an experimentally feasible control method to drive the system into the folded hidden state. We demonstrate, through a ternary cavity magnonic system and a gene regulatory network, that such hidden multistability is in fact quite common. Our findings shed light on hidden dynamical states in nonlinear physical systems which are not directly observable but can present challenges and opportunities in applications.

关键词： Bifurcations Complex systems Magnetization dynamics Magnons Coupled oscillators Direct numerical simulations Langevin equation

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Microfluidic-organic thin film transistor coupled platform for simple solution exposure

RSC Applied Interfaces

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RSC Applied Interfaces 2024年第4期1卷 771-778页

作者： Boileau, Nicholas T. King, Benjamin Kapar, Sparsh Sohi, Ali Najafi Manion, Joseph G. Godin, Michel Lessard, Benoît H. Department of Chemical and Biological Engineering University of Ottawa 161 Louis Pasteur Pvt Ottawa ON Canada Department of Physics University of Ottawa 150 Louis Pasteur Pvt Ottawa ON Canada Ottawa-Carleton Institute for Biomedical Engineering University of Ottawa 161 Louis Pasteur Pvt Ottawa ON Canada School of Electrical Engineering and Computer Science University of Ottawa 800 King Edward Ave. Ottawa ON Canada

Efforts to combine organic thin film transistors (OTFTs) within microfluidic networks to create sensitive, versatile, and low-cost sensors for rapid chemical analysis have been limited by the need for complex equipment and by the sensitivity of OTFTs to common processing techniques used in traditional microfluidic fabrication. We designed and validated a robust, easy to use, and simple to manufacture prototype microfluidic-OTFT pressure coupled system. Our design enables multiple OTFT architectures to be combined with microfluidic analyte delivery, eliminates common processing steps that can alter OTFT performance, and only requires easily-accessible equipment. As a proof of concept, we demonstrate the exposure of aluminium chloride phthalocyanine (AlClPc) based OTFTs to different solutions of sodium fluoride (NaF). This work could accelerate the design of more versatile, rapid, and reliable OTFT based liquid chemical sensors. © 2024 RSC.

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Coherence entropy during propagation through complex media

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Advanced Photonics 2024年第4期6卷 25-35页

作者： Xingyuan Lu Zhuoyi Wang Qiwen Zhan Yangjian Cai Chengliang Zhao Soochow University School of Physical Science and TechnologyJiangsu Key Laboratory of Frontier Material Physics and DevicesSuzhouChina University of Shanghai for Science and Technology School of Optical-Electrical and Computer EngineeringShanghaiChina Shandong Normal University School of Physics and ElectronicsShandong Provincial Engineering and Technical Center of Light ManipulationsShandong Provincial Key Laboratory of Optics and Photonic DeviceJinanChina East China Normal University Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East China Normal University and Shandong Normal UniversityShanghaiChina

The deformation,flicker,and drift of a light field owing to complex media such as a turbulent atmosphere have limited its practical ***,research on invariants in randomly fluctuated light fields has garnered considerable attention in recent *** is a statistical property of light,while its full and quantitative characterization is ***,we successfully realize the orthogonal modal decomposition of partially coherent beams and introduce the application of coherence entropy as a global coherence characteristic of such randomly fluctuated light *** is demonstrated that coherence entropy remains consistent during propagation in a unitary system by unraveling complex *** representative examples,we study the robustness of coherence entropy for partially coherent beams as they propagate through deformed optical systems and turbulent *** entropy is anticipated to serve as a key metric for evaluating the propagation of partially coherent beams in complex *** study paves the way for a broader application scope of a customized low-coherence light field through nonideal optical systems and complex media.

关键词： complex media propagation invariant modal decomposition orbital angular momentum statistical optics coherence

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Three-dimensional modeling of Marine Controlled Source Electromagnetic field using a space-wavenumber domain method

Three-dimensional modeling of Marine Controlled Source Elect...

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2023 International Conference on Frontiers of Ocean science and Technology, ICFOST 2023

作者： Chen, Qingrui Ma, Shuqing Zhang, Lilun Dai, Shikun Ling, Jiaxuan College of Metearology and Oceanography National University of Defense Technology HUNAN Changsha410073 China School of Geosciences and Info-physics Central South University Changsha410083 China College of Computer Science and Engineering Guilin University of Aerospace Technology GUANGXI Guilin541004 China

Under complex conditions, the three-dimensional modeling of Marine Controlled Source Electromagnetic field requires a significant amount of computation, resulting in slow calculation speed and high storage requirements. To solve these problems, we propose a 3D numerical simulation method of electromagnetic field in the space-wavenumber domain under the Lorenz gauge. Firstly, the new method utilizes the two-dimensional Fourier transform in the horizontal direction to transform the 3D partial differential equations of the Lorenz vector potentials into multiple independent ordinary differential equations. Secondly, the finite element method is used to solve the ordinary differential equations. The fields in the spatial domain are then obtained by using the inverse Fourier transform, and finally, an iterative method with a compact operator is applied to approximate the true solution. The approach requires less computation and storage, and the algorithm is highly parallel, which effectively improves the efficiency of 3D forward modeling of electromagnetic fields. The correctness, effectiveness, and computational efficiency of the method are verified by the design model. © Published under licence by IOP Publishing Ltd.

关键词： Electromagnetic fields

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An Omnidirectional Antenna with Dual-Gain and High-Gain for WiFi-6 Applications 6

An Omnidirectional Antenna with Dual-Gain and High-Gain for ...

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6th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2023

作者： Wang, Haolin Feng, Botao Ding, Xiao Deng, Li Sun, Sanshan Gu, Wenzhe College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Macau University of Science and Technology Faculty of Humanities and Arts 999078 China College of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China College of Physics and Electronic Engineering Sichuan Normal University Sichuan China School of Computer Science and Engineering Huizhou University Huizhou China

ISBN: (纸本)9798350399059

This letter proposes a high-gain omnidirectional antenna with dual-band for WiFi-5/WiFi -6 applications. The antenna is basically comprised of several slotted semi-circular radiation patches, L-shaped branch structure patches and coaxial feed sources. Here, symmetrical rectangular slots are used to increase impedance matching. The planar size of antenna is 12×35 mm2, which is much smaller than other dual-band WIFI antennas. The simulated results tell that the antenna can be used at 2.42.485 GHz and 5.155.85 GHz (|S11| © 2023 IEEE.

关键词： Dielectric materials

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Efficient survivable mapping algorithm for logical topology in IP-over-WDM optical networks against node failure

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Journal of Supercomputing 2023年第5期79卷 5037-5063页

作者： Cheng, Dun-Wei Chang, Jo-Yi Lin, Chen-Yen Lin, Limei Huang, Yanze Thulasiraman, Krishnaiyan Hsieh, Sun-Yuan Department of Computer Science and Information Engineering National Yunlin University of Science and Technology 123 University Road Yunlin64002 Taiwan Department of Computer Science and Information Engineering National Cheng Kung University No. 1 University Road Tainan701 Taiwan College of Mathematics and Informatics and the Key Laboratory of Network Security and Cryptology Fujian Normal University Fujian Fuzhou350117 China Fujian Provincial Key Laboratory of Big Data Mining and Applications School of Mathematics and Physics Fujian University of Technology Fujian Fuzhou350118 China Department of Computer Science University of Oklahoma 660 Parrington Oval NormanOK73019 United States Department of Computer Science and Information Engineering National Chi Nan University No. 1 Daxue Rd Nantou County Puli Township54561 Taiwan

The survivable mapping problem in an IP-over-WDM network with a logical graph and physical graph is the problem of finding a mapping of a logical network in a physical layer so that any failure in physical topology does not break the logical topology’s connection. Determining whether a survivable mapping against failure exists is an NP-complete problem, and therefore many heuristic algorithms have been proposed in the literature. In this paper, a heuristic mapping design strategy is proposed to enable the lightpaths to more efficiently endure a node failure. We individually consider the logical topology by building a Hamiltonian cycle and then deal with the mapping problem for disjoint physical paths. Experimental results demonstrate that the proposed algorithm can provide efficient survivable mapping in IP-over-WDM networks. The simulation shows that the survivability of previous methods (SNF and SMART-Node) is around 60–80%, but our proposed algorithm can build survivable mapping in all kinds of situations. © 2022, The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature.

关键词： Heuristic algorithms

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Electron charge qubit with 0.1 millisecond coherence time

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Nature physics 2024年第1期20卷 116-122页

作者： Zhou, Xianjing Li, Xinhao Chen, Qianfan Koolstra, Gerwin Yang, Ge Dizdar, Brennan Huang, Yizhong Wang, Christopher S. Han, Xu Zhang, Xufeng Schuster, David I. Jin, Dafei Center for Nanoscale Materials Argonne National Laboratory LemontIL United States Pritzker School of Molecular Engineering University of Chicago ChicagoIL United States Computational Research Division Lawrence Berkeley National Laboratory BerkeleyCA United States The NSF AI Institute for Artificial Intelligence and Fundamental Interactions CambridgeMA United States Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology CambridgeMA United States James Franck Institute and Department of Physics University of Chicago ChicagoIL United States Department of Electrical and Computer Engineering Northeastern University BostonMA United States Department of Applied Physics Stanford University StanfordCA United States Department of Physics and Astronomy University of Notre Dame Notre DameIN United States

Electron charge qubits are compelling candidates for solid-state quantum computing because of their inherent simplicity in qubit design, fabrication, control and readout. However, electron charge qubits built on conventional semiconductors and superconductors suffer from severe charge noise that limits their coherence time to the order of one microsecond. Here we report electron charge qubits that exceed this limit, based on isolated single electrons trapped on an ultraclean solid neon surface in a vacuum. Quantum information is encoded in the motional states of an electron that is strongly coupled with microwave photons in an on-chip superconducting resonator. The measured relaxation and coherence times are both on the order of 0.1 ms, surpassing all existing charge qubits and rivalling state-of-the-art superconducting transmon qubits. The simultaneous strong coupling of two qubits with a common resonator is also demonstrated, as the first step towards two-qubit entangling gates for universal quantum computing. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Superconducting resonators

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Exact Quantum Sensing Limits for Bosonic Dephasing Channels

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PRX Quantum 2024年第2期5卷 020354-020354页

作者： Zixin Huang Ludovico Lami Mark M. Wilde School of Mathematical and Physical Sciences Centre for Quantum Software and Information Faculty of Engineering and Information Technology Science Park 123 Amsterdam 1098 XG the Netherlands Korteweg–de Vries Institute for Mathematics Institute for Theoretical Physics School of Electrical and Computer Engineering

Dephasing is a prominent noise mechanism that afflicts quantum information carriers, and it is one of the main challenges toward realizing useful quantum computation, communication, and sensing. Here, we consider discrimination and estimation of bosonic dephasing channels, when using the most general adaptive strategies allowed by quantum mechanics. We reduce these difficult quantum problems to simple classical ones based on the probability densities defining the bosonic dephasing channels. By doing so, we rigorously establish the optimal performance of various distinguishability and estimation tasks and construct explicit strategies to achieve this performance. To the best of our knowledge, this is the first example of a non-Gaussian bosonic channel for which there are exact solutions for these tasks.

关键词： Non-gaussian quantum states Quantum channels Quantum fluctuations & noise Quantum information theory Quantum parameter estimation Quantum sensing

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The Effect of Annealing Temperature on Antiferroelectric Zirconia

The Effect of Annealing Temperature on Antiferroelectric Zir...

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2022 International Symposium on VLSI Technology, Systems and Applications, VLSI-TSA 2022

作者： Gaskell, Anthony A. Wang, Zheng Dopita, Milan Kriegner, Dominik Tasneem, Nujhat Khan, Asif I. Georgia Institute of Technology School of Electrical and Computer Engineering and of Materials Science and Engineering AtlantaGA United States Charles University Department of Condensed Matter Physics Prague Czech Republic

ISBN: (纸本)9781665409230

The relationship between the post-metallization annealing temperature of an antiferroelectric zirconia thin film and its electrical response was studied. It was determined that a minimum annealing temperature of 350 °C was required to achieve an antiferroelectric response in 10 nm ZrO2 thin films. A higher annealing temperature resulted in a larger switching current at the critical electric field of phase transformation (and hence larger saturation polarization) and a larger crystallite size as determined from grazing incidence X-ray diffraction analysis. It was therefore concluded that nanocrystallites smaller than a particular grain size did not undergo phase transformation at the critical electric field. © 2022 IEEE.

关键词： Zirconia

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Imaging atomic-scale chemistry from fused multi-modal electron microscopy

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npj Computational Materials 2022年第1期8卷 164-171页

作者： Jonathan Schwartz Zichao Wendy Di Yi Jiang Alyssa J.Fielitz Don-Hyung Ha Sanjaya D.Perera Ismail El Baggari Richard D.Robinson Jeffrey A.Fessler Colin Ophus Steve Rozeveld Robert Hovden Department of Materials Science and Engineering University of MichiganAnn ArborMIUSA Mathematics and Computer Science Division Argonne National LaboratoryLemontILUSA Advanced Photon Source Facility Argonne National LaboratoryLemontILUSA Dow Chemical Co. MidlandMIUSA Department of Material Science and Engineering Cornell UniversityIthacaNew YorkUSA School of Integrative Engineering Chung-Ang UniversitySeoulRepublic of Korea Department of Physics Cornell UniversityIthacaNYUSA The Rowland Institute at Harvard CambridgeMAUSA Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMIUSA National Center for Electron Microscopy Lawrence Berkeley National LaboratoryMolecular FoundryBerkeleyCAUSA Applied Physics Program University of MIchiganAnn ArborMIUnited States

Efforts to map atomic-scale chemistry at low doses with minimal noise using electron microscopes are fundamentally limited by inelastic ***,fused multi-modal electron microscopy offers high signal-to-noise ratio(SNR)recovery of material chemistry at nano-and atomic-resolution by coupling correlated information encoded within both elastic scattering(high-angle annular dark-field(HAADF))and inelastic spectroscopic signals(electron energy loss(EELS)or energy-dispersive x-ray(EDX)).By linking these simultaneously acquired signals,or modalities,the chemical distribution within nanomaterials can be imaged at significantly lower doses with existing detector *** many cases,the dose requirements can be reduced by over one order of *** high SNR recovery of chemistry is tested against simulated and experimental atomic resolution data of heterogeneous nanomaterials.

关键词： materials chemistry fused

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