Symmetric and conserved energy-momentum tensors in moving media
Institute of Physics, University of Oslo - 0316 Oslo, Norway
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