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Erratum: On the nonlinear dynamics of electro-magnon excitations in the BaTiO3/Fe nanostructured multiferroic composite material

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欧洲物理快报 2018年第4期123卷

作者： P. A. Paglan J. P. Nguenang S. Ruffo Pure Physics Laboratory: Group of Nonlinear Physics and Complex Systems Department of Physics Faculty of Science University of Douala - P.O. Box 24157 Douala Cameroon National Committee for Technology Development (CNDT) Ministry of Scientific Research and Innovation P.O. Box 1457 Yaounde Cameroon The Abdus Salam ICTP - Strada Costiera 11 I-34151 Trieste Italy SISSA - Via Bonomea 265 I-34136 Trieste Italy INFN Sezione di Trieste - I-34151 Trieste Italy Istituto dei Sistemi Complessi Consiglio Nazionale delle Ricerche - Via Madonna del Piano 10 I-50019 Sesto Fiorentino Italy

Original article: EPL, 122 (2018) *** for HTML: https://***/10.1209/0295-5075/123/49901

关键词： Errata

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Instabilities and relaxation to equilibrium in long-range oscillator chains

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Physical Review E 2015年第3期91卷 032927-032927页

作者： George Miloshevich Jean-Pierre Nguenang Thierry Dauxois Ramaz Khomeriki Stefano Ruffo Department of Physics Faculty of Exact and Natural Sciences Tbilisi State University 0128 Tbilisi Georgia Department of Physics The University of Texas at Austin Austin TX 78712 USA Fundamental Physics Laboratory: Group of Nonlinear Physics and Complex Systems Department of Physics University of Douala P.O. Box 24157 Douala Cameroon Laboratoire de Physique de l'ENS Lyon Université de Lyon CNRS 46 allée d'Italie 69007 Lyon France Dipartimento di Fisica e Astronomia and CSDC Università di Firenze CNISM and INFN via G. Sansone 1 Sesto Fiorentino Italy

We study instabilities and relaxation to equilibrium in a long-range extension of the Fermi-Pasta-Ulam-Tsingou (FPU) oscillator chain by exciting initially the lowest Fourier mode. Localization in mode space is stronger for the long-range FPU model. This allows us to uncover the sporadic nature of instabilities, i.e., by varying initially the excitation amplitude of the lowest mode, which is the control parameter, instabilities occur in narrow amplitude intervals. Only for sufficiently large values of the amplitude, the system enters a permanently unstable regime. These findings also clarify the long-standing problem of the relaxation to equilibrium in the short-range FPU model. Because of the weaker localization in mode space of this latter model, the transfer of energy is retarded and relaxation occurs on a much longer timescale.

关键词： RELAXATION oscillators PARTICLE beam instabilities EQUILIBRIUM ELECTRONIC excitation ENERGY transfer

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26th Annual Computational Neuroscience Meeting (CNS*2017) of the Organization for Computational Neuroscience Antwerp, Belgium, July 15-20, 2017

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 59-59页

作者： [Anonymous] Indiana University Purdue University Indianapolis Indianapolis IN 46032 USA Stark Neurosciences Research Institute Indiana University School of Medicine Indianapolis IN 46032 USA Department of Mathematics East Carolina University Greenville NC 27858 USA Jülich Supercomputing Centre Forschungszentrum Jülich 52425 Jülich Germany Future Systems Swiss National Supercomputing Centre 8092 Zurich Switzerland User Engagement and Support Swiss National Supercomputing Centre 6900 Lugano Switzerland Institut de Neurosciences des Systèmes Aix Marseille Univ 13005 Marseille France Simulation Lab Neuroscience Forschungszentrum Jülich Jülich Germany Department of Experimental Psychology Ghent University 9000 Ghent Belgium Donders Center for Cognitive Neuroimaging Radboud University 6525HR Nijmegen The Netherlands Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO 80309 USA Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Otolaryngology Johns Hopkins School of Medicine Baltimore MD 21287 USA INSERM U968 Paris France Sorbonne Universités UPMC University Paris 06 UMR_S 968 Institut de la Vision Paris France CNRS UMR_7210 Paris France Department of Computer Architecture and Technology University of Granada (CITIC) Granada Spain Sorbonne Universités UPMC Univ Paris 06 INSERM CNRS Institut de la Vision Paris France Department of Adaptive Machine Systems Osaka University Osaka Japan Department of Computer Science University of Cergy-Pontoise Cergy-Pontoise France Department of Physics and Astronomy College of Charleston Charleston SC 29424 USA School of Physics Faculty of Science University of Sydney Sydney NSW 2006 Australia Center of Excellence for Integrative Brain Function Australian Research Council Sydney Australia Max Planck Institute for Human Cognitive and Brain Sciences Saxony Lei

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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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Localized nonlinear excitations in diffusive Hindmarsh-Rose neural networks

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Physical Review E 2014年第5期89卷 052919-052919页

作者： F. M. Moukam Kakmeni E. M. Inack E. M. Yamakou Complex Systems and Theoretical Biology Group Laboratory of Research on Advanced Materials and Nonlinear Science (LaRAMaNS) Department of Physics Faculty of Science University of Buea P.O. Box 63 Buea-Cameroon

We study localized nonlinear excitations in diffusive Hindmarsh-Rose neural networks. We show that the Hindmarsh-Rose model can be reduced to a modified complex Ginzburg-Landau equation through the application of a perturbation technique. We equally report on the presence of envelop solitons of the nerve impulse in this neural network. From the biological point of view, this result suggests that neurons can participate in a collective processing of information, a relevant part of which is shared over all neurons but not concentrated at the single neuron level. By employing the standard linear stability analysis, the growth rate of the modulational instability is derived as a function of the wave number and systems parameters.

关键词： NEURAL networks (Computer science) LANDAU theory WAVENUMBER PERTURBATION (Quantum dynamics) SOLITONS

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Modulational Instability in a Pair of Non-identical Coupled nonlinear Electrical Transmission Lines

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Communications in Theoretical physics 2013年第7期60卷 93-100页

作者： Eric Tala-Tebue Aurelien Kenfack-Jiotsa Marius Herv Tatchou-Ntemfack Timolon Crpin Kofan Laboratory of Mechanics Department of Physics Faculty of Sciences University of YaoundI Nonlinear Physics and Complex Systems Group Department of Physics The Higher Teachers' Training College University of Yaounde I

In this work, we investigate the dynamics of modulated waves non-identical coupled nonlinear transmission lines. Traditional methods for avoiding mode mixing in identical coupled nonlinear electrical lines consist of adding the same number of linear inductors in each branch. Adding linear inductors in a single line leads to asymmetric coupled nonlinear electrical transmission lines which propagate the signal and the mode mixing. On one hand, the difference between the two lines induced the fission for only one mode of propagation. This fission is influenced by the amplitude of the signal and the amount of the input energy as well; it also narrows the width of the input pulse soliton, leading to a possible increasing of the bit rate. On the other hand, the dissymmetry of the two lines converts the network into a good amplifier for the ω_ mode which corresponds to the regime admitting low frequencies.

关键词： nonlinear lines mixing suppression fission

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Raman Scattering Signatures of Kitaev Spin Liquids in A2IrO3 Iridates with A=Na or Li

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Physical Review Letters 2014年第18期113卷 187201-187201页

作者： J. Knolle Gia-Wei Chern D. L. Kovrizhin R. Moessner N. B. Perkins Max Planck Institute for the Physics of Complex Systems D-01187 Dresden Germany Center for Nonlinear Studies and Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA T.C.M. Group Cavendish Laboratory J. J. Thomson Avenue Cambridge CB3 0HE United Kingdom and RRC Kurchatov Institute 1 Kurchatov Square Moscow 123182 Russia Department of Physics University of Wisconsin Madison Wisconsin 53706 USA School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55116 USA

We show how Raman spectroscopy can serve as a valuable tool for diagnosing quantum spin liquids (QSL). We find that the Raman response of the gapless QSL of the Kitaev-Heisenberg model exhibits signatures of spin fractionalization into Majorana fermions, which give rise to a broad signal reflecting their density of states, and Z2 gauge fluxes, which also contribute a sharp feature. We discuss the current experimental situation and explore more generally the effect of breaking the integrability on response functions of Kitaev spin liquids.

关键词： RAMAN scattering RAMAN spectroscopy MAJORANA fermions DENSITY of states LIQUIDS

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Transverse Stability in the Discrete Inductance-Capacitance Electrical Network

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Journal of Modern physics 2013年第6期4卷 746-753页

作者： Eric Tala-Tebue Aurelien Kenfack-Jiotsa Laboratory of Mechanics Department of PhysicsFaculty of SciencesUniversity of Yaounde IYaoundeCameroon Nonlinear Physics and Complex Systems Group Department of PhysicsThe Higher Teachers’Training CollegeUniversity of Yaounde IYaoundeCameroon

This work investigates the dynamics of modulated waves in a coupled nonlinear LC transmission line. By means of a method based on the semi-discrete limit and in suitably scaled coordinates, we derive the two-dimensional NLS equation governing the propagation of slowly modulated waves in the network. The exact transverse solution is found and the analytical criteria of stability of this solution are derived. The condition for which the network can exhibit modulational instability is also determined. The exactness of this analytical analysis is confirmed by numerical simulations performed on the exact equation of the network.

关键词： Two-Dimensional nonlinear Schrodinger Equation Exact Transverse Solution Stability Modulational Instability

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Wave train generation of solitons in systems with higher-order nonlinearities

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Physical Review E 2010年第1期82卷 016601-016601页

作者： Alidou Mohamadou C. G. LatchioTiofack Timoléon C. Kofané Max Planck Institute for the Physics of Complex Systems Nothnitzer Strasse 38 01187 Dreseden Germany Group of Nonlinear Physics and Complex Systems Faculty of Science University of Douala P.O. Box 24157 Douala Cameroon Laboratory of Mechanics Department of Physics Faculty of Science University of Yaounde I P.O. Box 812 Yaounde Cameroon

Considering the higher-order nonlinearities in a material can significantly change its behavior. We suggest the extended nonlinear Schrödinger equation to describe the propagation of ultrashort optical pulses through a dispersive medium with higher-order nonlinearities. Soliton trains are generated through the modulational instability and we point out the influence of the septic nonlinearity in the modulational instability gain. Experimental values are used for the numerical simulations and the input plane wave leads to the development of pulse trains, depending upon the sign of the septic nonlinearity.

关键词： Solitons

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Fermionic bound states on a one-dimensional lattice

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Physical Review A 2009年第1期80卷 015601-015601页

作者： Jean-Pierre Nguenang Sergej Flach Max-Planck-Institut für Physik Komplexer Systeme Nöthnitzer Strasse 38 01187 Dresden Germany Fundamental Physics Laboratory: Group of Nonlinear Physics and Complex Systems Department of Physics University of Douala P.O. Box 24157 Douala Cameroon

We study bound states of two fermions with opposite spins in an extended Hubbard chain. The particles interact when located both on a site or on adjacent sites. We find three different types of bound states. Type U is predominantly formed of basis states with both fermions on the same site, while two states of type V originate from both fermions occupying neighboring sites. Type U and one of the states from type V are symmetric with respect to spin flips. The remaining one from type V is antisymmetric. V states disappear by merging with the two-particle continuum below some critical wave number. All bound states become compact for wave numbers at the edge of the Brillouin zone.

关键词： Condensed matter physics

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