Kinetic and Related Models最新文献

{"title":"Global existence and large time behavior of the quantum Boltzmann equation with small relative entropy","authors":"Yong Wang, C. Xiao, Yinghui Zhang","doi":"10.3934/krm.2022025","DOIUrl":"https://doi.org/10.3934/krm.2022025","url":null,"abstract":"<p style='text-indent:20px;'>In this paper, we study the global well-posedness of the non-relativistic quantum Boltzmann equation with initial data of small relative entropy. For a class of initial data which are allowed to have arbitrary bounded amplitude and even contain vacuum, we establish the global existence and uniqueness of the mild solutions to the quantum Boltzmann equation in the torus <inline-formula><tex-math id=\"M1\">begin{document}$ xinmathbb T^3 $end{document}</tex-math></inline-formula>. The exponential time decay rate is also obtained in the <inline-formula><tex-math id=\"M2\">begin{document}$ L^{infty}_{x, v} $end{document}</tex-math></inline-formula>-norm.</p>","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77908244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy-Casimir method for the dynamical systems with modified gravitational potential","authors":"T. Salnikova","doi":"10.3934/krm.2022039","DOIUrl":"https://doi.org/10.3934/krm.2022039","url":null,"abstract":"","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76686136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structured derivation of moment equations and stable boundary conditions with an introduction to symmetric, trace-free tensors","authors":"","doi":"10.3934/krm.2022035","DOIUrl":"https://doi.org/10.3934/krm.2022035","url":null,"abstract":"","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86842596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The stochastic delayed Cucker-Smale system in a harmonic potential field","authors":"Linglong Du, Xinyun Zhou","doi":"10.3934/krm.2022022","DOIUrl":"https://doi.org/10.3934/krm.2022022","url":null,"abstract":"We propose a delayed Cucker-Smale system with multiplicative noise in a harmonic potential field and investigate its emergent dynamics. It exhibits a collective behavior \"flocking and concentration\" if the corresponding non-delay stochastic system admits the almost surely collective behavior and the delay is sufficiently small. We provide theoretical framework and numerical simulations.","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75628489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to: On the entropic property of the ellipsoidal statistical model with the Prandtl number below 2/3","authors":"Shigeru Takata, Masanari Hattori, Takumu Miyauchi","doi":"10.3934/krm.2022013","DOIUrl":"https://doi.org/10.3934/krm.2022013","url":null,"abstract":"<jats:p xml:lang=\"fr\" />","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76028063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On solutions of Vlasov-Poisson-Landau equations for slowly varying in space initial data","authors":"A. Bobylev, I. Potapenko","doi":"10.3934/krm.2022020","DOIUrl":"https://doi.org/10.3934/krm.2022020","url":null,"abstract":"<p style='text-indent:20px;'>The paper is devoted to analytical and numerical study of solutions to the Vlasov-Poisson-Landau kinetic equations (VPLE) for distribution functions with typical length <inline-formula><tex-math id=\"M1\">begin{document}$ L $end{document}</tex-math></inline-formula> such that <inline-formula><tex-math id=\"M2\">begin{document}$ varepsilon = r_D/L << 1 $end{document}</tex-math></inline-formula>, where <inline-formula><tex-math id=\"M3\">begin{document}$ r_D $end{document}</tex-math></inline-formula> stands for the Debye radius. It is also assumed that the Knudsen number <inline-formula><tex-math id=\"M4\">begin{document}$ mathrm{K!n} = l/L = O(1) $end{document}</tex-math></inline-formula>, where <inline-formula><tex-math id=\"M5\">begin{document}$ l $end{document}</tex-math></inline-formula> denotes the mean free pass of electrons. We use the standard model of plasma of electrons with a spatially homogeneous neutralizing background of infinitely heavy ions. The initial data is always assumed to be close to neutral. We study an asymptotic behavior of the system for small <inline-formula><tex-math id=\"M6\">begin{document}$ varepsilon > 0 $end{document}</tex-math></inline-formula>. It is known that the formal limit of VPLE at <inline-formula><tex-math id=\"M7\">begin{document}$ varepsilon = 0 $end{document}</tex-math></inline-formula> does not describe a rapidly oscillating part of the electrical field. Our aim is to fill this gap and to study the behavior of the \"true\" electrical field near this limit. We show that, in the problem with standard isotropic in velocities Maxwellian initial conditions, there is almost no damping of these oscillations in the collisionless case. An approximate formula for the electrical field is derived and then confirmed numerically by using a simplified BGK-type model of VPLE. Another class of initial conditions that leads to strong oscillations having the amplitude of order <inline-formula><tex-math id=\"M8\">begin{document}$ O(1/varepsilon ) $end{document}</tex-math></inline-formula> is considered. A formal asymptotic expansion of solution in powers of <inline-formula><tex-math id=\"M9\">begin{document}$ varepsilon $end{document}</tex-math></inline-formula> is constructed. Numerical solutions of that class are studied for different values of parameters <inline-formula><tex-math id=\"M10\">begin{document}$ varepsilon $end{document}</tex-math></inline-formula> and <inline-formula><tex-math id=\"M11\">begin{document}$ mathrm{K!n} $end{document}</tex-math></inline-formula>.</p>","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86003117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On phase-field equations of Penrose–Fife type with the conserved order parameter under flux boundary condition: Global-in-time solvability and uniform boundedness","authors":"","doi":"10.3934/krm.2022036","DOIUrl":"https://doi.org/10.3934/krm.2022036","url":null,"abstract":"","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90324152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emergence of state-locking for the first-order nonlinear consensus model on the real line","authors":"Junhyeok Byeon, Seung‐Yeal Ha, Jeongho Kim","doi":"10.3934/krm.2022034","DOIUrl":"https://doi.org/10.3934/krm.2022034","url":null,"abstract":"","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88172478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sufficient conditions for asymptotic phase-locking to the generalized Kuramoto model","authors":"Chanho Min, Hyunjin Ahn, Seung‐Yeal Ha, Myeongju Kang","doi":"10.3934/krm.2022024","DOIUrl":"https://doi.org/10.3934/krm.2022024","url":null,"abstract":"In this paper, we introduce a generalized Kuramoto model and provide several sufficient conditions leading to asymptotic phase-locking. The proposed generalized Kuramoto model incorporates relativistic Kuramoto type models which can be derived from the relativistic Cucker-Smale (RCS) on the unit sphere via suitable approximations. For asymptotic phase-locking, we present several sufficient frameworks leading to complete synchronization in terms of initial data and system parameters. For the relativistic Kuramoto model, we show that it reduces to the Kuramoto model in a finite time interval, as the speed of light tends to infinity. Moreover, for some admissible initial data, nonrelativistic limit can be made uniformly in time. We also provide several numerical examples for two approximations of the relativistic Kuramoto model, and compare them with analytical results.","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74557889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A moment closure based on a projection on the boundary of the realizability domain: Extension and analysis","authors":"T. Pichard","doi":"10.3934/krm.2022014","DOIUrl":"https://doi.org/10.3934/krm.2022014","url":null,"abstract":"A closure relation for moments equations in kinetic theory was recently introduced in [38], based on the study of the geometry of the set of moments. This relation was constructed from a projection of a moment vector toward the boundary of the set of moments and corresponds to approximating the underlying kinetic distribution as a sum of a chosen equilibrium distribution plus a sum of purely anisotropic Dirac distributions.The present work generalizes this construction for kinetic equations involving unbounded velocities, i.e. to the Hamburger problem, and provides a deeper analysis of the resulting moment system. Especially, we provide representation results for moment vectors along the boundary of the moment set that implies the well-definition of the model. And the resulting moment model is shown to be weakly hyperbolic with peculiar properties of hyperbolicity and entropy of two subsystems, corresponding respectively to the equilibrium and to the purely anisotropic parts of the underlying kinetic distribution.","PeriodicalId":49942,"journal":{"name":"Kinetic and Related Models","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79764078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}