arXiv subjects

George Dedkov

Publications and source records attributed to George Dedkov.

4 recordsLinked to original sources

arXiv2020

Nonlocal Friction Forces in the Particle-Plate and Plate-Plate Configurations: Nonretarded Approximation

In the nonrelativistic approximation of fluctuation electrodynamics, using the specular reflection model and the nonlocal dielectric permittivity of a metal, we obtained simple analytical expressions for the friction forces in the particle-plate and plate-plate systems upon relative motion of the bodies with constant velocity. It is shown that at separations of about 1{\div}10 nm, for an Au nanoparticle (or a gold plate) moving near another gold plate at rest, the dissipative forces are 2 to 4 orders of magnitude higher than in the case when the local Drude dielectric permittivity is used.

cond-mat.mes-hall↗

arXiv2019

Dynamically and Thermally Nonequilibrium Fluctuation-Electromagnetic Interactions: Recent Results and Trends

Our recent theoretical developments related to the nonrelativistic and relativistic fluctuation-electromagnetic interactions of bodies with different temperatures moving translationally and (or) rotationally relative to each other are briefly summarized. Three basic geometrical configurations and physical systems are discussed: "a small particle and a thick plate (i);"a small particle in radiation vacuum background" (ii), and "two thick plates in relative motion (iii) -classical Casimir-Lifshitz configuration with allowance for relative motion and different temperatures of plates. For the third configuration, it is shown that the theory of friction and heat exchange by Levin-Polevoi-Rytov proves to be quite adequate contrary to the settled point of view of many authors.

cond-mat.mes-hall↗

arXiv2014

Comment on "Casimir torque on two rotating plates"

We discuss the recent result by Xiang Chen (Int. J. Mod. Phys. 27(14) 1350066 (2013)) and show that the formula obtained for the Casimir torque in the systems of two isotropic rotating particles (plates) is incorrect.

cond-mat.other↗

arXiv2010

On the radiative heat exchange between spherical particles at small distances

Radiative heat exchange of spherical particles is recalculated in the framework of fluctuation electrodynamics using the dipole approximation. We show that correct numerical coefficient in the resulting integral expression equals 4/pi, in contrast with that obtained by other authors.

cond-mat.other↗