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The nonlinear evolution of unstable C-type shocks in weakly ionized plasmas is studied by means of time-dependent magnetohydrodynamical simulations. This study is limited to shocks in magnetically dominated plasmas (in which the Alfven…

天体物理学 · 物理学 2009-10-30 James M. Stone

Highly magnetized neutron stars have quantum refraction effects on pulsar emission due to the non-linearity of the quantum electrodynamics (QED) action. In this paper, we investigate the evolution of the polarization states of pulsar…

高能天体物理现象 · 物理学 2024-11-12 Dong-Hoon Kim , Chul Min Kim , Sang Pyo Kim

Quantitative thermodynamical, dynamical and magnetic properties of the solar and stellar plasmas are obtained by interpreting their emergent non-polarized and polarized spectrum. This inference requires the selection of a set of spectral…

太阳与恒星天体物理 · 物理学 2016-05-25 A. Asensio Ramos , J. de la Cruz Rodriguez , M. J. Martinez Gonzalez , A. Pastor Yabar

The transport equations for polarized radiation transfer in non-Riemannian, Weyl-Cartan type space-times are derived, with the effects of both torsion and non-metricity included. To obtain the basic propagation equations we use the tangent…

广义相对论与量子宇宙学 · 物理学 2009-11-11 K. S. Cheng , T. Harko , X. Y. Wang

It was generally assumed that the Stokes parameters are complete characterization for the state of polarization of a plane light wave so that their counterparts in quantum optics, called the Stokes operators, represent the polarization of…

光学 · 物理学 2023-09-25 Chun-Fang Li , Zhi-Juan Hu

An electromagnetic wave can be uniquely characterized by the four Stokes parameters: I, Q, U, and V. Typical observations in astronomy rely solely on total intensity measurements of the incoming radiation (Stokes I). However, a significant…

星系天体物理 · 物理学 2010-07-08 Jo-Anne C. Brown , Jeroen M. Stil , Tom L. Landecker

We study the evolution of cosmological perturbations, using a hybrid approximation scheme which upgrades the weak-field limit of Einstein's field equations to account for post-Newtonian scalar and vector metric perturbations and for…

天体物理学 · 物理学 2007-05-23 Carmelita Carbone , Sabino Matarrese

An effort has been made to solve the Cauchy problem of the Navier-Stokes equations in the whole space by two methods. It is proved that the sum of the three vorticity components is a time-invariant in fluid motion. It has been proved that,…

流体动力学 · 物理学 2014-09-18 F. Lam

Stationary scattering of TE and TM waves propagating in an isotropic medium with planar symmetry is described by Bergmann's equation in one dimension. This is a generalization of Helmholtz equation which allows for developing transfer…

光学 · 物理学 2025-10-21 Farhang Loran , Ali Mostafazadeh , Cem Yetişmişoğlu

We present a general radiative transfer model which allows the Zeeman diagnostics of complex and unresolved solar magnetic fields. Present modeling techniques still rely to a large extent on a-priori assumptions about the geometry of the…

天体物理学 · 物理学 2009-11-13 T. A. Carroll , M. Kopf

The higher-order Stokes phenomenon can emerge in the asymptotic analysis of many problems governed by singular perturbations. Indeed, over the last two decades, the phenomena has appeared in many physical applications, from acoustic and…

经典分析与常微分方程 · 数学 2024-12-10 Josh Shelton , Samuel Crew , Philippe H. Trinh

In this article, we consider the evolutionary model for magnetoelasticity with vanishing viscosity/damping, which is a nonlinear dispersive system. The global regularity and scattering of the evolutionary model for magnetoelasticity under…

偏微分方程分析 · 数学 2024-02-27 Xiaonan Hao , Jiaxi Huang , Ning Jiang , Lifeng Zhao

Based on the Vlasov-Maxwell equations describing the self-consistent nonlinear beam dynamics and collective processes, the evolution of an intense sheet beam propagating through a periodic focusing field has been studied. It has been shown…

斑图形成与孤子 · 物理学 2009-11-10 Stephan I. Tzenov

As an approach to the motion of particles in an anisotropic liquid, we analytically study the Stokes drag of spherical particles in a nematic liquid crystal. The Stokes drag of spherical particles for a general anisotropic case is derived…

软凝聚态物质 · 物理学 2014-03-07 M. V. Kozachok , B. I. Lev

Space-time evolution of spin polarization within the framework of hydrodynamics with spin based on de Groot - van Leeuwen - van Weert forms of energy-momentum and spin tensors is studied. Due to the non-boost invariant flow in the system…

高能物理 - 唯象学 · 物理学 2022-03-10 Wojciech Florkowski , Radoslaw Ryblewski , Rajeev Singh , Gabriel Sophys

We study Gaussian wave packet solutions for Maxwell's equations in an isotropic, inhomogeneous medium and derive a system of ordinary differential equations that captures the leading-order correction to geodesic motion. The dynamical…

偏微分方程分析 · 数学 2026-03-31 Sam C. Collingbourne , Marius A. Oancea , Jan Sbierski

The evolution of Alfven turbulence due to three-wave interactions is discussed using kinetic theory for a collisionless, thermal plasma. There are three low-frequency modes, analogous to the three modes of compressible MHD. When only Alfven…

天体物理学 · 物理学 2009-11-11 Q. Luo , D. B. Melrose

In this paper we consider an abstract Cauchy problem for a Maxwell system modelling electromagnetic fields in the presence of an interface between optical media. The electric polarization is in general time-delayed and nonlinear, turning…

偏微分方程分析 · 数学 2023-11-21 Tomáš Dohnal , Mathias Ionescu-Tira , Marcus Waurick

Experimental Stokes vector spectroscopy characterizes polarization state noise in nonlinear fiber transmission. Noise bandwidths of a few MHz are observed from XPM-blurred receive SOPs using a polarization scrambling interferometer. This…

信号处理 · 电气工程与系统科学 2019-06-04 Lothar Moeller

We deal with the rigorous homogenization and dimension reduction of flow and transport problems posed in thin $\varepsilon$-periodic perforated layers with thickness of order $\varepsilon^{\alpha}$ with $\alpha \in (0,1)$ and therefore the…

偏微分方程分析 · 数学 2025-12-05 Markus Gahn , Vlad Revnic