Null energy condition and superluminal propagation
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Cites background from "Null energy condition and superlumi..."
...For generalizations to include a non-vanishing vorticity, see [30]....
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...For simplicity, we assume potential flow; an extension to allow for vorticity should be straightforward, along the lines of [30]....
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50 citations
Cites background from "Null energy condition and superlumi..."
...In the limit where one of the two boundaries approaches the horizon of a black brane, the effective action to the lowest order in the derivative expansion becomes that of a perfect fluid, in agreement with [11, 12] and the generalization of [19], but at higher orders this near-horizon limit is singular....
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...Another example is the effective action approach initiated in [10] and revisited more recently in [11, 12], which we review in Section 2....
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