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New electromagnetic...
New electromagnetic conservation laws
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- Bergqvist, Göran (author)
- Linköpings universitet,Tillämpad matematik,Tekniska högskolan
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- Eriksson, Ingemar (author)
- Linköpings universitet,Tillämpad matematik,Tekniska högskolan
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- Senovilla, J. M. M. (author)
- Departamento de Física Teórica, Universidad del País Vasco, Bilbao, Spain
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(creator_code:org_t)
- 2003-05-29
- 2003
- English.
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In: Classical and Quantum Gravity. - : IOP Publishing. - 0264-9381 .- 1361-6382. ; 20:13, s. 2663-2668
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Abstract
Subject headings
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- The Chevreton superenergy tensor was introduced in 1964 as a counterpart, for electromagnetic fields, of the well-known Bel–Robinson tensor of the gravitational field. We here prove the unnoticed facts that, in the absence of electromagnetic currents, Chevreton's tensor (i) is completely symmetric, and (ii) has a trace-free divergence if the Einstein–Maxwell equations hold. It follows that the trace of the Chevreton tensor is a rank-2, symmetric, trace-free, conserved tensor, which is different from the energy–momentum tensor, and nonetheless can be constructed for any test Maxwell field or any Einstein–Maxwell spacetime.
Subject headings
- NATURVETENSKAP -- Matematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics (hsv//eng)
Keyword
- MATHEMATICS
- MATEMATIK
Publication and Content Type
- ref (subject category)
- art (subject category)
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