arXiv - PHYS - Pattern Formation and Solitons最新文献_第7页

Electromagnetic breathing dromion-like structures in an anisotropic ferromagnetic medium 各向异性铁磁介质中的电磁呼吸二重子样结构

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-19 DOI: arxiv-2406.13320

Sathishkumar Perumal, J. Sivapragasam, M. Lakshmanan

{"title":"Electromagnetic breathing dromion-like structures in an anisotropic ferromagnetic medium","authors":"Sathishkumar Perumal, J. Sivapragasam, M. Lakshmanan","doi":"arxiv-2406.13320","DOIUrl":"https://doi.org/arxiv-2406.13320","url":null,"abstract":"The influence of Gilbert damping on the propagation of electromagnetic waves\u0000(EMWs) in an anisotropic ferromagnetic medium is investigated theoretically.\u0000The interaction of the magnetic field component of the electromagnetic wave\u0000with the magnetization of a ferromagnetic medium has been studied by solving\u0000the associated Maxwell's equations coupled with a Landau-Lifshitz-Gilbert (LLG)\u0000equation. When small perturbations are made on the magnetization of the\u0000ferromagnetic medium and magnetic field along the direction of propagation of\u0000electromagnetic wave by using the reductive perturbation method, the associated\u0000nonlinear dynamics is governed by a time-dependent damped derivative nonlinear\u0000Schrodinger (TDDNLS) equation. The Lagrangian density function is constructed\u0000by using the variational method to solve the TDDNLS equation to understand the\u0000dynamics of the system under consideration. The propagation of EMW in a\u0000ferromagnetic medium with inherent Gilbert damping admits very interesting\u0000nonlinear dynamical structures. These structures include Gilbert\u0000damping-managing symmetrically breathing solitons, localized erupting\u0000electromagnetic breathing dromion-like modes of excitations, breathing\u0000dromion-like soliton, decaying dromion-like modes and an unexpected\u0000creation-annihilation mode of excitations in the form of growing-decaying\u0000dromion-like modes.","PeriodicalId":501370,"journal":{"name":"arXiv - PHYS - Pattern Formation and Solitons","volume":"131 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing necks and wrinkles in inflated auxetic membranes 设计充气辅助膜的颈部和皱纹

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-19 DOI: arxiv-2406.13442

Sairam Pamulaparthi Venkata, Valentina Balbi, Michel Destrade, Giuseppe Zurlo

引用次数: 0

Periodic Orbits in Fermi-Pasta-Ulam-Tsingou Systems 费米-帕斯塔-乌兰-钦古系统中的周期轨道

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-16 DOI: arxiv-2406.10790

Nachiket Karve, Nathan Rose, David Campbell

引用次数: 0

Chaotic dynamics creates and destroys branched flow 混沌动力学产生并破坏了支流

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-14 DOI: arxiv-2406.12922

Alexandre Wagemakers, Aleksi Hartikainen, Alvar Daza, Esa Räsänen, Miguel A. F. Sanjuán

{"title":"Chaotic dynamics creates and destroys branched flow","authors":"Alexandre Wagemakers, Aleksi Hartikainen, Alvar Daza, Esa Räsänen, Miguel A. F. Sanjuán","doi":"arxiv-2406.12922","DOIUrl":"https://doi.org/arxiv-2406.12922","url":null,"abstract":"The phenomenon of branched flow, visualized as a chaotic arborescent pattern\u0000of propagating particles, waves, or rays, has been identified in disparate\u0000physical systems ranging from electrons to tsunamis, with periodic systems only\u0000recently being added to this list. Here, we explore the laws governing the\u0000evolution of the branches in periodic potentials. On one hand, we observe that\u0000branch formation follows a similar pattern in all non-integrable potentials, no\u0000matter whether the potentials are periodic or completely irregular. Chaotic\u0000dynamics ultimately drives the birth of the branches. On the other hand, our\u0000results reveal that for periodic potentials the decay of the branches exhibits\u0000new characteristics due to the presence of infinitely stable branches known as\u0000superwires. Again, the interplay between branched flow and superwires is deeply\u0000connected to Hamiltonian chaos. In this work, we explore the relationships\u0000between the laws of branched flow and the structures of phase space, providing\u0000extensive numerical and theoretical arguments to support our findings.","PeriodicalId":501370,"journal":{"name":"arXiv - PHYS - Pattern Formation and Solitons","volume":"359 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141530074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single and merger soliton dynamics in scalar field dark matter with and without self-interactions 有自相互作用和无自相互作用标量场暗物质中的单孤子和合并孤子动力学

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-11 DOI: arxiv-2406.07419

Matthias Stallovits, Tanja Rindler-Daller

{"title":"Single and merger soliton dynamics in scalar field dark matter with and without self-interactions","authors":"Matthias Stallovits, Tanja Rindler-Daller","doi":"arxiv-2406.07419","DOIUrl":"https://doi.org/arxiv-2406.07419","url":null,"abstract":"(abridged)Scalar field dark matter (SFDM) made of bosons has become a popular\u0000alternative to the CDM paradigm, especially for its potential to cure the\u0000so-called \"small-scale problems\" of CDM. Cosmological simulations have\u0000determined that SFDM halos exhibit a core-envelope structure, but they are\u0000computationally expensive. Halo cores have been found to be well approximated\u0000by \"solitons\". The study of single soliton and multiple soliton merger dynamics\u0000constitutes a more feasible approach to investigate in detail the genuine\u0000quantum dynamics of SFDM and its interplay with self-gravity for a multitude of\u0000free boson parameters. In this paper, we present dedicated simulations of\u0000single solitons and binary soliton mergers, for models without and with a\u00002-boson, repulsive, weak to intermediate self-interaction (SI), as well as\u0000multiple soliton mergers without SI. We adapt the open-source code Pyultralight\u0000to simulate solitons with SI. We derive numerical scaling relations between the\u0000central density and mass of solitons for several values of SI and find\u0000deviations from the monotonic relations known from fuzzy dark matter (no SI),\u0000or the strongly repulsive Thomas-Fermi regime. Solitons with SI exemplify\u0000larger cores and lower central densities, compared to solitons without SI.\u0000Using our simulations, we extract numerical density profiles for solitons and\u0000post-merger objects, and fit them to analytic functions of previous literature.\u0000We find a mild preference for Gaussian cores for objects with SI, while the\u0000envelopes of post-mergers can be fit to NFW profiles albeit with some caution\u0000as we discuss. Similar to previous work, we find global, persistent\u0000oscillations for solitons as well as post-mergers, confirming that\u0000self-gravitating SFDM has very long relaxation times, although objects with SI\u0000exhibit oscillations of comparatively smaller amplitude.","PeriodicalId":501370,"journal":{"name":"arXiv - PHYS - Pattern Formation and Solitons","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimentally Tractable Generation of High-Order Rogue Waves in Bose-Einstein Condensates 在玻色-爱因斯坦凝聚态中可实验生成的高阶无序波

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-11 DOI: arxiv-2406.06869

Jimmie Adriazola, Panayotis Kevrekidis

引用次数: 0

Solitary waves and kinks in FPU lattices with soft-hard-soft trilinear interactions 具有软-硬-软三线性相互作用的 FPU 晶格中的孤波和扭结

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-10 DOI: arxiv-2406.06437

Anna Vainchtein, Lev Truskinovsky

{"title":"Solitary waves and kinks in FPU lattices with soft-hard-soft trilinear interactions","authors":"Anna Vainchtein, Lev Truskinovsky","doi":"arxiv-2406.06437","DOIUrl":"https://doi.org/arxiv-2406.06437","url":null,"abstract":"We consider a version of the classical Hamiltonian Fermi-Pasta-Ulam (FPU)\u0000problem with a trilinear force-strain relation of soft-hard-soft type that is\u0000in general non-symmetric. In addition to the classical spatially localized\u0000solitary waves, such hardening-softening model also exhibits supersonic kinks\u0000and finite-amplitude, spatially delocalized flat-top solitary waves that\u0000acquire the structure of a kink-antikink bundle when their velocity approaches\u0000the kink limit. Exploiting the fact that traveling waves are periodic modulo\u0000shift by a lattice spacing, we compute these solutions as fixed points of the\u0000corresponding nonlinear map and investigate how their properties depend on the\u0000parameter measuring the asymmetry of the problem. In a particularly interesting\u0000case when one of the soft regimes has zero elastic modulus, we obtain explicit\u0000solutions for sufficiently slow solitary waves. In contrast to conventional\u0000delocalization in the sonic limit, these compact structures mounted on a\u0000constant background become localized at the lattice scale as their velocity\u0000tends to zero. Numerical simulations of Riemann-type initial value problem in\u0000this degenerate model show the emergence of Whitham shocks that involve\u0000periodic trains of solitary waves. We investigate stability of the obtained\u0000solutions using direct numerical simulations and Floquet analysis. We also\u0000obtain explicit solutions for a quasicontinuum model that captures some\u0000important features of the discrete problem.","PeriodicalId":501370,"journal":{"name":"arXiv - PHYS - Pattern Formation and Solitons","volume":"131 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unified view of scalar and vector dark matter solitons 标量和矢量暗物质孤子的统一观点

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-07 DOI: arxiv-2406.05031

Hong-Yi Zhang

{"title":"Unified view of scalar and vector dark matter solitons","authors":"Hong-Yi Zhang","doi":"arxiv-2406.05031","DOIUrl":"https://doi.org/arxiv-2406.05031","url":null,"abstract":"The existence of solitons -- stable, long-lived, and localized field\u0000configurations -- is a generic prediction for ultralight dark matter. These\u0000solitons, known by various names such as boson stars, axion stars, oscillons,\u0000and Q-balls depending on the context, are typically treated as distinct\u0000entities in the literature. This study aims to provide a unified perspective on\u0000these solitonic objects for real or complex, scalar or vector dark matter,\u0000considering self-interactions and nonminimal gravitational interactions. We\u0000demonstrate that these solitons share universal nonrelativistic properties,\u0000such as conserved charges, mass-radius relations, stability and profiles.\u0000Without accounting for alternative interactions or relativistic effects,\u0000distinguishing between real and complex scalar dark matter is challenging.\u0000However, self-interactions differentiate real and complex vector dark matter\u0000due to their different dependencies on the macroscopic spin density of dark\u0000matter waves. Furthermore, gradient-dependent nonminimal gravitational\u0000interactions impose an upper bound on soliton amplitudes, influencing their\u0000mass distribution and phenomenology in the present-day universe.","PeriodicalId":501370,"journal":{"name":"arXiv - PHYS - Pattern Formation and Solitons","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activity patterns in ring networks of quadratic integrate-and-fire neurons with synaptic and gap junction coupling 具有突触和间隙连接耦合的四元整合发射神经元环状网络的活动模式

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-04 DOI: arxiv-2406.01881

Oleh E. Omel'chenko, Carlo R. Laing

引用次数: 0

Observation of chiral solitary waves in a nonlinear Aharonov-Bohm ring 非线性阿哈诺夫-玻姆环中的手性孤波观测

arXiv - PHYS - Pattern Formation and Solitons Pub Date : 2024-06-03 DOI: arxiv-2406.01732

Ivan Velkovsky, Anya Abraham, Enrico Martello, Jiarui Yu, Yaashnaa Singhal, Antonio Gonzalez, DaVonte Lewis, Hannah Price, Tomoki Ozawa, Bryce Gadway

引用次数: 0