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We present the results of numerical simulations of wave propagation and jet formation in solar atmosphere models with different magnetic field configurations. The presence in the chromosphere of waves with periods longer than the acoustic…

太阳与恒星天体物理 · 物理学 2011-12-05 L. Heggland , V. H. Hansteen , B. De Pontieu , M. Carlsson

The sensitivity of the Rabi oscillations of a resonantly driven spin-1/2 system to a weak and slow modulation of the static longitudinal magnetic field, B_0, is studied theoretically. We establish the mapping of a weakly driven two-level…

介观与纳米尺度物理 · 物理学 2013-04-24 R. Glenn , M. E. Limes , B. Pankovich , B. Saam , M. E. Raikh

Direct numerical simulations of turbulent suspension flows are carried out with the Force-Coupling Method in plane Couette and pressure-driven channel configurations. Dilute to moderately concentrated suspensions of neutrally buoyant…

流体动力学 · 物理学 2018-08-15 Guiquan Wang , Micheline Abbas , Eric Climent

A large body of knowledge about magnetism is attained from models of interacting spins, which usually reside on magnetic ions. Proposals beyond the ionic picture are uncommon and seldom verified by direct observations in conjunction with…

We propose a new reduced fluid model for the study of the drift wave -- zonal flow dynamics in magnetically confined plasmas. Our model can be viewed as an extension of the classic Hasegawa-Wakatani (HW) model, and is based on an improved…

等离子体物理 · 物理学 2018-11-14 Andrew J. Majda , Di Qi , Antoine J. Cerfon

Magnetic flux ropes within interplanetary coronal mass ejections are often characterized as simplistic cylindrical or toroidal tubes with field lines that twist around the cylinder or torus axis. Recent multi-point observations suggest that…

太阳与恒星天体物理 · 物理学 2024-06-21 Andreas J. Weiss , Teresa Nieves-Chinchilla , Christian Möstl

The DTS experiment is a spherical Couette flow experiment with an imposed dipolar magnetic field. Liquid sodium is used as a working fluid. In a series of measurement campaigns, we have obtained data on the mean axisymmetric velocity, the…

流体动力学 · 物理学 2015-06-11 Henri-Claude Nataf

We report the development of a hybrid numerical / analytical model capable of mapping the spatially-varying distributions of the local ferromagnetic resonance (FMR) frequency and dynamic magnetic susceptibility in a wide class of patterned…

介观与纳米尺度物理 · 物理学 2019-05-29 C. S. Davies , V. D. Poimanov , V. V. Kruglyak

We investigate the dynamics of two-dimensional assemblies of rod-shaped magnetic colloids under the influence of an external rotating magnetic field. Using Molecular Dynamics, we simulate the formation of patterns that emerge based on the…

软凝聚态物质 · 物理学 2024-05-27 Jorge L. C. Domingos , F. Q. Potiguar , C. L. N. Oliveira , W. P. Ferreira

Examples of test electromagnetic waves on a Friedmann-Lemaitre-Robertson-Walker(FLRW) background are constructed from explicit perturbations of the FLRW space-times describing gravitational waves propagating in the isotropic universes. A…

广义相对论与量子宇宙学 · 物理学 2009-07-30 P. A. Hogan , S. O'Farrell

We present simulations of the propagation of magnetized jets. This work differs from previous studies in that the cross-sectional distributions of the jets's state variables are derived from analytical models for magneto-centrifugal…

天体物理学 · 物理学 2009-10-31 Adam Frank , Thibaut Lery , Thomas A. Gardiner , T. W. Jones , D. Ryu

Planetary systems exhibiting mean-motion resonances (MMRs) offer unique opportunities to study the imprint of disk-induced migration on the orbital architectures of planetary systems. The HD 45364 system, discovered via the radial velocity…

地球与行星天体物理 · 物理学 2025-02-24 Ian Chow , Sam Hadden

Using a multi-conduction-channel model, we redefined the micromechanism of spin Hall magnetoresistance (SMR). Four conduction channels are created by spin accumulation of nonpolarized electron flow at top, bottom, left and right interfaces…

材料科学 · 物理学 2015-02-17 Yan-Qing Zhang , Hua-Rui Fu , Niu-Yi Sun , Wen-Ru Che , Ding Ding , Juan Qin , Cai-Yin You , Zhen-Gang Zhu , Rong Shan

At the intersection of galactic dynamics, evolution and global structure, issues such as the relation between bars and spirals and the persistence of spiral patterns can be addressed through the characterization of the angular speeds of the…

We describe experimentally observed collective dynamics in colloidal suspensions of model hard-sphere particles using a modified mode coupling theory (MCT). This rescaled MCT is capable to describe quantitatively the wave-vector and…

软凝聚态物质 · 物理学 2024-03-08 Joel Diaz Maier , Joachim Wagner

Modulation instability, rogue wave and spectral analysis are investigated for the nonlinear Schrodinger equation with the higher-order terms. The modulation instability distribution characteristics from the sixth-order to the eighth-order…

可精确求解与可积系统 · 物理学 2020-06-24 Yunfei Yue , Lili Huang , Yong Chen

3D-MHD numerical simulations of bipolar, hypersonic, weakly magnetized jets and synthetic synchrotron observations are presented to study the structure and evolution of magnetic fields in FR II radio sources. The magnetic field setup in the…

宇宙学与河外天体物理 · 物理学 2015-05-20 Martin Huarte-Espinosa , Martin Krause , Paul Alexander

Muon Spin Rotation/Relaxation ({\mu}SR) is a powerful probe to study diffusion of hydrogen-like particles. One of the most common model to analyze {\mu}SR signals from materials where diffusion occurs, is by using functions derived from the…

无序系统与神经网络 · 物理学 2011-12-08 J. Rodriguez , A. Amato , E. Pomjakushina

The Earth's magnetosheath provides a high $\beta$ (ratio of electron thermal pressure to magnetic pressure) plasma environment where kinetic Alfv\'en waves (KAWs) strongly influence turbulence and energy dissipation. This study investigates…

等离子体物理 · 物理学 2025-12-11 Mani K. Chettri , Hemam D. Singh , Vivek Shrivastav , Britan Singh , Rupak Mukherjee

We demonstrate an experimental method for direct 2D and 3D imaging of magnetic radio-frequency (rf) field distribution in metal-dielectric structures based on traveling wave (TW) magnetic resonance imaging (MRI) at ultra-high field (> 7T).…

仪器与探测器 · 物理学 2016-01-19 A. Tonyushkin , D. K. Deelchand , P. -F. Van de Moortele , G. Adriany , A. Kiruluta