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We analyse the thermal fluctuations of magnetization textures in two stray field coupled elements, forming mesospins. To this end, the energy landscape associated with the thermal dynamics of the textures is mapped out and asymmetric energy…

介观与纳米尺度物理 · 物理学 2022-09-15 Samuel D. Slöetjes , Björgvin Hjörvarsson , Vassilios Kapaklis

We present two-dimensional fully-kinetic Particle-in-Cell simulations of decaying electromagnetic fluctuations. The computational box is such that wavelengths ranging from electron to ion gyroradii are resolved. The parameters used are…

空间物理 · 物理学 2011-03-14 Enrico Camporeale , David Burgess

Two interaction mechanisms of particles in a fluid are proposed on base of forces, mediated by hydrodynamic thermal fluctuations. The first one is similar to the conventional van der Waals interaction, but instead of been mediated by…

软凝聚态物质 · 物理学 2009-11-07 B. I. Ivlev

We analyze offshore wind speeds with a time resolution of one second over a long period of 20 months for different heights above the sea level. Energy spectra extending over more than seven decades give a comprehensive picture of wind…

流体动力学 · 物理学 2023-10-20 So-Kumneth Sim , Joachim Peinke , Philipp Maass

In this review, we systematically examine the principles and the practices of fluctuations such as the momentum and the charge fluctuations as applied to the heavy ion collisions. Main emphases are: (i) Fluctuations as signals of phase…

高能物理 - 唯象学 · 物理学 2007-05-23 Sangyong Jeon , Volker Koch

The interface between a liquid and a solid is the location of plethora of intrincate mechanisms at the nanoscale, at the root of their specific emerging properties in natural processes or technological applications. However, while the…

We study the effects of thermal fluctuations on a small elastic ring. We derive analytical expressions for the correlation functions of the Euler angles, for the real space two--point correlation functions and for the probability…

软凝聚态物质 · 物理学 2007-05-23 Y. Rabin , S. Panyukov

We study the coupled current and magnetization noise in magnetic nanostructures by magnetoelectronic circuit theory. Spin current fluctuations, which depend on the magnetic configuration, are found to be an important source of magnetization…

介观与纳米尺度物理 · 物理学 2015-05-13 Jorn Foros , Arne Brataas , Gerrit E. W. Bauer , Yaroslav Tserkovnyak

The power spectrum of finite-temperature quantum electromagnetic fluctuations produced by elementary charge carriers under the influence of external electric field is investigated. It is found that under the combined action of the photon…

量子物理 · 物理学 2009-11-13 Kirill A. Kazakov

Because of the broken time-translation symmetry, in periodically driven vibrational systems fluctuations of different vibration components have different intensities. Fluctuations of one of the components are often squeezed, whereas…

介观与纳米尺度物理 · 物理学 2020-06-26 J. S. Huber , G. Rastelli , M. J. Seitner , J. Kölbl , W. Belzig , M. I. Dykman , E. M. Weig

For the first time, new important features of the fluctuation electromagnetic interaction between a small conducting particle and a smooth surface of polarizable medium (both dielectric and metallic) are worked out. The particle is…

其他凝聚态物理 · 物理学 2009-03-06 G. V. Dedkov , A. A. Kyasov

We consider the interaction between two rods embedded in a fluctuating surface. The modification of fluctuations by the rods leads to an attractive long-range interaction between them. We consider fluctuations governed by either surface…

凝聚态物理 · 物理学 2009-10-28 Ramin Golestanian , Mark Goulian , Mehran Kardar

We calculate the fluctuations in the current and energy densities for the case of a quantized, minimally coupled, massless, complex scalar field around a straight and infinitesimally thin cosmic string carrying magnetic flux. At zero…

广义相对论与量子宇宙学 · 物理学 2009-10-31 L. Sriramkumar

We theoretically investigate the role of spin fluctuations in charge transport through a magnetic junction. Motivated by recent experiments that measure a nonlinear dependence of the current on electrical bias, we develop a systematic…

介观与纳米尺度物理 · 物理学 2019-02-06 Scott A. Bender , Rembert A. Duine , Yaroslav Tserkovnyak

The importance of mesoscale fluctuations in flowing amorphous materials is widely accepted, without a clear understanding of their role. We propose a mean-field elastoplastic model that admits both stress and strain-rate fluctuations, and…

软凝聚态物质 · 物理学 2022-05-09 Timothy Ekeh , Étienne Fodor , Suzanne M. Fielding , Michael E. Cates

Electrons moving in a conductor can transfer momentum to the lattice via collisions with impurities and boundaries, giving rise to a fluctuating mechanical stress tensor. The root-mean-squared momentum transfer per scattering event in a…

介观与纳米尺度物理 · 物理学 2007-05-23 A. V. Shytov , L. S. Levitov , C. W. J. Beenakker

In this work, we perform a statistical study of magnetic field fluctuations in the solar wind at 1 au using permutation entropy and complexity analysis, and the investigation of the temporal variations of the Hurst exponents. Slow and fast…

太阳与恒星天体物理 · 物理学 2024-03-26 Emilia Kilpua , Simon Good , Matti Ala-Lahti , Adnane Osmane , Venla Koikkalainen

We propose an effective field theory describing the time dependent fluctuations of electrons in conducting systems, generalizing the well known kinetic theory of fluctuations. On several examples, we show its equivalence, (when quantum…

介观与纳米尺度物理 · 物理学 2009-03-22 D. B. Gutman , A. D. Mirlin , Yuval Gefen

We investigate the interaction of many wind turbines in a wind farm with a focus on their electrical power production. The operational data of two offshore wind farms with a ten minute and a ten second time resolution, respectively, are…

应用统计 · 统计学 2023-11-07 Edgar Jungblut , Henrik M. Bette , Thomas Guhr

We have investigated the role of the quantum size effects in the evaluation of the force caused by electromagnetic vacuum fluctuations between ultra-thin films, using the dielectric tensor derived from the particle in a box model.…

量子物理 · 物理学 2009-11-13 Andrea Benassi , Carlo Calandra