In large N conformal field theories, states built from light scalar operators or stress tensors can have negative smeared null energy, but the negative amount is bounded by a scale set by the central charge.
35 with Iab(x) = δab − 2 xaxb x2 the inversion operator
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How negative can null energy be in large N CFTs?
In large N conformal field theories, states built from light scalar operators or stress tensors can have negative smeared null energy, but the negative amount is bounded by a scale set by the central charge.