Casimir friction force and energy dissipation for moving harmonic oscillators. II
Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
2 Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
Corresponding author: a email@example.com
Published online: 21 January 2011
This paper is a second in a series devoted to the study of a two-oscillator system in linear relative motion (the first one published as a letter in [J.S. Høye, I. Brevik, Europhys. Lett. 91, 60003 (2010)]). The main idea behind considering this kind of system is to use it as a simple model for Casimir friction. In the present paper we extend our previous theory so as to obtain the change in the oscillator energy to second order in the perturbation, even though we employ first order perturbation theory only. The results agree with, and confirm, our earlier results obtained via different routes. The friction force is finite at finite temperatures, whereas in the case of two oscillators moving with constant relative velocity the force becomes zero at zero temperature, due to slowly varying coupling.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2011