IEC 60050 - International Electrotechnical Vocabulary


IEVref:	113-07-54	ID:
Language:	en	Status: Standard

Term:	stress-energy tensor
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Symbol:	$T$
Definition:	symmetric 4 × 4 tensor that provides the flux of the $μ^{th}$ component of the four-momentum $\underline{\underline{p}}$ across a surface in space-time with constant component $x_{ν}$ by $T_{μ ν} : = \frac{1}{μ_{0}} (\sum_{κ} F_{μ κ} F_{κ ν} + \frac{1}{4} δ_{μ ν} \sum_{κ λ} F_{κ λ}^{2})$ , where $μ_{0}$ is magnetic constant, $F_{μ ν}$ are components of the electromagnetic field tensor, and $δ_{μ ν}$ is Kronecker symbol Note 1 to entry: The coherent SI unit of the stress-energy tensor is kilogram metre per second, $kg \cdot m \cdot s^{-1} = J \cdot m^{−3}$ .
Publication date:	2022-06
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