Division of the energy and of the momentum of electromagnetic waves in linear media into electromagnetic and material parts

OPTICS COMMUNICATIONS

卷:284

Article

Saldanha, Pablo L.^1,2 

[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

[2] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

关键词: Abraham-Minkowski controversy;    Electromagnetic energy;    Electromagnetic momentum;   

DOI  :  10.1016/j.optcom.2011.02.007

来源: Elsevier

【 摘 要 】

We defend a natural division of the energy density, energy flux and momentum density of electromagnetic waves in linear media in electromagnetic and material parts. In this division, the electromagnetic part of these quantities have the same form as in vacuum when written in terms of the macroscopic electric and magnetic fields, the material momentum is calculated directly from the Lorentz force that acts on the charges of the medium, the material energy is the sum of the kinetic and potential energies of the charges of the medium and the material energy flux results from the interaction of the electric field with the magnetized medium. We present reasonable models for linear dispersive non-absorptive dielectric and magnetic media that agree with this division. We also argue that the electromagnetic momentum of our division can be associated with the electromagnetic relativistic momentum, inspired on the recent work of Barnett (Phys. Rev. Lett. 104 (2010) 0704011 that showed that the Abraham momentum is associated with the kinetic momentum and the Minkowski momentum is associated with the canonical momentum. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free