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Aspects of Ultra-Relativistic Field Theories via Flat-space Holography
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Recently it was proposed that asymptotically flat spacetimes have a holographic dual which is an ultra-relativistic conformal field theory. In this paper, we obtain the conformal anomaly for such a theory via the flat-space holography technique. Furthermore, using flat-space holography we obtain a C-function for this theory which is monotonically decreasing from the UV to the IR by employing the null energy condition in the bulk.
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First Law of Entanglement Entropy in Flat-Space Holography
In flat-space holography, the first law of entanglement entropy of a BMS-invariant field theory is shown to imply the linearized Einstein equations in the three-dimensional bulk.
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