| Issue |
EPL
Volume 99, Number 5, September 2012
|
|
|---|---|---|
| Article Number | 50002 | |
| Number of page(s) | 4 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/99/50002 | |
| Published online | 07 September 2012 | |
Symmetric and conserved energy-momentum tensors in moving media
Institute of Physics, University of Oslo - 0316 Oslo, Norway
(a) finnr@fys.uio.no
Received: 3 February 2012
Accepted: 1 August 2012
A symmetric and conserved energy-momentum tensor for a scalar field in a moving medium is derived using the Gordon metric. When applied to an electromagnetic field, the method gives a similar result. This approach thus points a way out of the old Abraham-Minkowski controversy about the correct energy-momentum tensors for the electromagnetic field in a material medium. The new tensor describes the properties of the field alone while the Abraham tensor contains information about the field coupled to the medium.
PACS: 03.50.De – Classical electromagnetism, Maxwell equations / 11.10.Ef – Lagrangian and Hamiltonian approach / 42.50.-p – Quantum optics
© EPLA, 2012
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