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Diffeomorphism Symmetry in Two Dimensions and Celestial Holography (2208.13304v2)
Published 28 Aug 2022 in hep-th and gr-qc
Abstract: Two-dimensional diffeomorphism symmetry can be described by an operator algebra extension of the well-known Virasoro algebra description of conformal symmetry. Utilizing this extension, this note explains why the conformal symmetry that appears in celestial holography should not be extended to diffeomorphism symmetry, a possibility that several authors have proposed. The description of the two-dimensional diffeomorphism algebra presented here might be useful for other purposes.
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