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A two dimensional magnetic particle in the presence of an external magnetic field is studied. Equilibrium thermodynamical properties are derived by evaluating analytically the partition function. When the external field is applied…

凝聚态物理 · 物理学 2009-11-07 P. Vargas , D. Altbir , M. Knobel , D. Laroze

We present detailed calculations for the Casimir force between a plane and a nanostructured surface at finite temperature in the framework of the scattering theory. We then study numerically the effect of finite temperature as a function of…

量子物理 · 物理学 2015-01-27 R. Guérout , J. Lussange , H. B. Chan , A. Lambrecht , S. Reynaud

In this work, we investigated the effect of knots in the thermal transport of graphene nanoribbons through non-equilibrium molecular dynamics simulations. We considered the cases of one, two, and three knots are present. Temperature jumps…

介观与纳米尺度物理 · 物理学 2022-08-04 Levi C. Felix , Alexandre F. Fonseca , Douglas S. Galvao

An approximate analytical formula for the capacitance of a non-parallel plate capacitor with small values of inclination angles and distance separations of the plates is presented. Most applications involving position sensing that are…

广义相对论与量子宇宙学 · 物理学 2013-05-20 Bijunath R. Patla

We present a number of arguments to demonstrate that a quantum analog of Cherenkov effect occurs when two dispersive objects are in relative motion. Specifically we show that two semi-infinite plates experience friction beyond a threshold…

量子物理 · 物理学 2013-11-04 Mohammad F. Maghrebi , Ramin Golestanian , Mehran Kardar

Quantum theory predicts the existence of the Casimir force between macroscopic bodies, due to the zero-point energy of electromagnetic field modes around them. This quantum fluctuation-induced force has been experimentally observed for…

量子物理 · 物理学 2011-08-19 A. O. Sushkov , W. J. Kim , D. A. R. Dalvit , S. K. Lamoreaux

A parametric study of Drude and Lorentz models performances in maximizing near-field radiative heat transfer between two semi-infinite planes separated by nanometric distances at room temperature is presented in this paper. Optimal…

介观与纳米尺度物理 · 物理学 2013-07-19 Elyes Nefzaoui , Younès Ezzahri , Jérémie Drevillon , Karl Joulain

The van der Waals force established between two surfaces plays a central role in many phenomena, such as adhesion or friction. However, the dependence of this forces on the distance of separation between plates is very complex. Two widely…

介观与纳米尺度物理 · 物理学 2022-05-12 Juan Luengo-Márquez , Luis G. MacDowell

The classical electromagnetic friction of a charged particle moving with prescribed constant velocity parallel to a planar imperfectly conducting surface is reinvestigated. As a concrete example, the Drude model is used to describe the…

经典物理 · 物理学 2020-05-06 Kimball A. Milton , Yang Li , Xin Guo , Gerard Kennedy

Heat conduction of one-dimensional chain of equivalent rigid particles in the field of external on-site potential is considered. Zero diameters of the particles correspond to exactly integrable case with divergent heat conduction…

凝聚态物理 · 物理学 2009-11-10 O. V. Gendelman , A. V. Savin

Colloidal migration in temperature gradient is referred to as thermophoresis. In contrast to particles with spherical shape, we show that elongated colloids may have a thermophoretic response that varies with the colloid orientation.…

软凝聚态物质 · 物理学 2017-10-19 Zihan Tan , Mingcheng Yang , Marisol Ripoll

Inspired by some recent molecular dynamics (MD) simulations and experiments on suspended graphene nanoribbons, we study a simplified model where the atoms are disposed in a rectangular lattice coupled by nearest neighbor interactions which…

介观与纳米尺度物理 · 物理学 2015-10-20 R. Barreto , M. F. Carusela , A. Mancardo Viotti , A. G. Monastra

Temperature imaging of nanoscale systems is a fundamental problem which has myriad potential technological applications. For example, nanoscopic cold spots can be used for spot cooling electronic components while hot spots could be used for…

介观与纳米尺度物理 · 物理学 2020-03-04 Abhay Shastry , Sosuke Inui , Charles A. Stafford

The resource theory of thermal operations, an established model for small-scale thermodynamics, provides an extension of equilibrium thermodynamics to nonequilibrium situations. On a lattice of any dimension with any translation-invariant…

The divergence-free time-independent velocity vector field has been determined so as to maximise heat transfer between two parallel plates of a constant temperature difference under the constraint of fixed total enstrophy. The present…

流体动力学 · 物理学 2018-08-03 Shingo Motoki , Genta Kawahara , Masaki Shimizu

The effect of changing the Knudsen number on the thermal properties of static argon gas within nanoscale confinement is investigated by three-dimensional molecular dynamics simulations. Utilizing thermalized channel walls, it is observed…

流体动力学 · 物理学 2018-05-15 Reza Rabani , Ghassem Heidarinejad , Jens Harting , Ebrahim Shirani

We theoretically investigate the heat transfer between two metals across a vacuum gap in extreme near-field regime by quantifying the relative contribution of electrons, phonons and photons. We show that electrons play a dominant role in…

介观与纳米尺度物理 · 物理学 2018-10-08 Riccardo Messina , Svend-Age Biehs , Till Ziehm , Achim Kittel , Philippe Ben-Abdallah

We explore near-field radiative heat transfer between two bodies under time modulation by developing a rigorous fluctuational electrodynamics formalism. We demonstrate that time modulation can results in the enhancement, suppression,…

光学 · 物理学 2024-04-24 Renwen Yu , Shanhui Fan

The meaning of temperature in nonequilibrium thermodynamics is considered by using a forced harmonic oscillator in a heat bath, where we have two effective temperatures for the position and the momentum, respectively. We invent a concrete…

统计力学 · 物理学 2007-05-23 Takahiro Hatano , David Jou

We study the Casimir effect for parallel plates with massless Majorana fermions obeying the bag boundary conditions at finite temperature. The thermal influence will modify the effect. It is found that the sign of the Casimir energy keeps…

高能物理 - 理论 · 物理学 2010-08-27 Hongbo Cheng