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The dissipative mechanism in weakly collisional plasma is a topic that pervades decades of studies without a consensus solution. We compare several energy dissipation estimates based on energy transfer processes in plasma turbulence and…

We present a method for determining the free energy of coexisting states from irreversible work measurements. Our approach is based on a fluctuation relation that is valid for dissipative transformations in partially equilibrated systems.…

软凝聚态物质 · 物理学 2009-02-21 Ivan Junier , Alessandro Mossa , Maria Manosas , Felix Ritort

The second law of thermodynamics uses change in free energy of macroscopic systems to set a bound on performed work. Ergotropy plays a similar role in microscopic scenarios, and is defined as the maximum amount of energy that can be…

We show how the conversion of magnetic field energy via magnetic reconnection can progress in a fully three-dimensional, fast, volume-filling regime. An initial configuration representative of many laboratory, space and astrophysical…

太阳与恒星天体物理 · 物理学 2015-05-27 Giovanni Lapenta , Lapo Bettarini

We obtain new expressions for the Casimir energy between plates that are mimicked by the most general possible boundary conditions allowed by the principles of quantum field theory. This result enables to provide the quantum vacuum energy…

数学物理 · 物理学 2020-02-19 J. M. Muñoz-Castañeda , M. Bordag , L. Santamaría-Sanz

Metals in one spatial dimension are described at the lowest energy scales by the Luttinger liquid theory. It is well understood that this free theory, and even interacting integrable models, can support ballistic transport of conserved…

统计力学 · 物理学 2020-05-28 Vir B. Bulchandani , Christoph Karrasch , Joel E. Moore

Nonlinear gyrokinetics provides a suitable framework to describe short-wavelength turbulence in magnetized laboratory and astrophysical plasmas. In the electrostatic limit, this system is known to exhibit a free energy cascade towards small…

等离子体物理 · 物理学 2014-08-07 S. S. Cerri , A. Bañón Navarro , F. Jenko , D. Told

Based on a recent communication by the present authors the question of energy dissipation in magneto hydrodynamical waves in an inflating background in general relativity is examined. It is found that the expanding background introduces a…

广义相对论与量子宇宙学 · 物理学 2010-11-03 Ajanta Das , S. Chatterjee

It is well known that collisionless systems are dissipation free from the perspective of particle collision and thus conserve entropy. On the other hand, processes such as magnetic reconnection and turbulence appear to convert large-scale…

等离子体物理 · 物理学 2020-04-01 Senbei Du , Gary P. Zank , Fan Guo , Xiaocan Li

The concept of energetic particle reservoirs, essentially based on the assumption of the presence of outer reflecting boundaries/magnetic mirrors or diffusion barriers (deterministic) rather than on the effect of particle diffusive…

空间物理 · 物理学 2021-09-15 H. -Q. He

The most important characteristics of the fragmentation of heterogeneous solids is that the mass (size) distribution of pieces is described by a power law functional form. The exponent of the distribution displays a high degree of…

无序系统与神经网络 · 物理学 2015-03-10 Gergo Pal , Imre Varga , Ferenc Kun

We show that the total kinetic energy (TKE) of nuclei after the spontaneous fission of $^{258}$Fm can be well reproduced using simple assumptions on the quantum collective phase-space explored by the nucleus after passing the fission…

核理论 · 物理学 2017-04-19 Yusuke Tanimura , Denis Lacroix , Sakir Ayik

Magnetic reconnection is commonly considered as a mechanism of solar (eruptive) flares. A deeper study of this scenario reveals, however, a number of open issues. Among them is the fundamental question, how the magnetic energy is…

太阳与恒星天体物理 · 物理学 2015-03-17 Miroslav Bárta , Jörg Büchner , Marian Karlický , Jan Skála

Magnetic reconnection is a fundamental process in a plasma that facilitates the release of energy stored in the magnetic field by permitting a change in the magnetic topology. In this article we present a review of the current state of…

太阳与恒星天体物理 · 物理学 2012-07-04 D. I. Pontin

Maximizing the amount of work harvested from an environment is important for a wide variety of biological and technological processes, from energy-harvesting processes such as photosynthesisto energy storage systems such as fuels and…

We study the energy flow of dissipative dynamics on infinite lattices, allowing the total energy to be infinite and considering formally gradient dynamics. We show that in spatial dimensions 1,2, the flow is for almost all times arbitrarily…

动力系统 · 数学 2013-01-16 Sinisa Slijepcevic

Receptor-mediated endocytosis requires that the energy of adhesion overcomes the deformation energy of the plasma membrane. The resulting driving force is balanced by dissipative forces, leading to deterministic dynamical equations. While…

亚细胞过程 · 定量生物学 2019-11-20 Felix Frey , Falko Ziebert , Ulrich S. Schwarz

Allowing the energy of a gravitational field to serve partially as its own source allows gravitating bodies to exhibit stronger fields, as if they were more massive. Depending on degree of compaction of the body, the field could be one to…

天体物理学 · 物理学 2013-01-29 Yousef Sobouti

Basing our arguments on the theory of active liquid crystals, we demonstrate both analytically and numerically, that the activity can induce an effective free energy which enhances ordering in extensile systems of active rods and in…

软凝聚态物质 · 物理学 2015-10-27 Sumesh P. Thampi , Amin Doostmohammadi , Ramin Golestanian , Julia M. Yeomans

The renormalized energy density of a massless scalar field defined in a D-dimensional flat spacetime is computed in the presence of "soft" and "semihard" boundaries, modeled by some smoothly increasing potential functions. The sign of the…

高能物理 - 理论 · 物理学 2021-10-19 F. Caruso , R. De Paola , N. F. Svaiter