Abstract
Existing literature implements the Dominant Energy Condition for dissipative fluids in general relativity. It is pointed out that this condition fails to forbid superluminal flows, which is what it is ultimately supposed to do. Tilted perfect fluids, which formally have the stress-energy tensor of imperfect fluids, are discussed for comparison.
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Notes
We use the notation of Ref. [13], in which the metric has signature \({-}{+}{+}{+}\) and units are used in which the speed of light c and Newton’s constant G are unity.
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This work is supported, in part, by the Natural Sciences and Engineering Research Council of Canada (Grant 2016-03803 to V.F.).
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Faraoni, V., Mokkedem, E.M.Z.R. Dominant energy condition and dissipative fluids in general relativity. Gen Relativ Gravit 55, 56 (2023). https://doi.org/10.1007/s10714-023-03110-x
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DOI: https://doi.org/10.1007/s10714-023-03110-x