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POSTER PRESENTATION
Tuesday, 15:40, Panel No. 7
Nonequilibrium thermodynamics aspects of a disspative electromagnetism
A. Jelic, M. Hütter, H.C. Öttinger
ETH Zurich, Department of Materials, Switzerland
The standard macroscopic Maxwell equations are obtained from the microscopic ones by spatial and/or ensemble averaging. However, in both cases, only single time properties are considered, while temporal correlations and two-time ensemble averages are neglected. In this work we examine specifically dissipative effects in electromagnetism on macroscopic scales by coarse-graining the microscopic Maxwell equations with respect to time. Particular emphasis is put on the derivation of the dissipative effects on the macroscopic scale by using a Green-Kubo type expression in terms of the microscopic fluctuations and the correlations between them, which give rise to dissipative processes such as Ohmic currents, the thermoelectric effect, and also to irreversible contributions to the electric and magnetic fields. In order to capture the interplay between the thermodynamic behavior of the medium and the electromagnetic field, and to discuss dissipative effects in electromagnetism in a consistent manner we have used the General Equation for the Non-Equilibrium Reversible-Irreversible Coupling (GENERIC) framework. The results are compared to the ones of Liu and coworkers, who previously incorporated dissipative effects into the Maxwell equations [1]. © IWNET 2006
[1] Phys. Rev. Lett. 70, 3580 (1993) and later papers.
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and Kleanthi for IWNET 2006