ar X iv : g r - qc / 9 90 10 19 v 1 7 J an 1 99 9 REMARKS ON SUPERENERGY TENSORS
نویسنده
چکیده
We define (super) n-energy tensors for non-gravitational fields. The possibility of interchange of superenergy between gravitational and other fields is considered. 1 The Bel-Robinson tensor and its properties. The Bel-Robinson (BR) tensor 1,2 is defined by T αβλµ ≡ C αρλσ C β µ ρ σ + * C αρλσ * C β µ ρ σ (1) where C αρλσ is the Weyl tensor and * indicates the usual dual operation: * C αβλµ ≡ (1/2) η αβρσ C ρσ λµ = (1/2) η λµρσ C ρσ αβ. Its main properties are: A It is completely symmetric and traceless T αβλµ = T (αβλµ) , T α λµ α = 0.
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