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DOE OSTI · 1598779

2D Stress Tensor for 4D Gravity

Kapec, Daniel·Mitra, Prahar·Raclariu, Ana-Maria·Strominger, Andrew
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Abstract

Here, we use the subleading soft-graviton theorem to construct an operator T z z whose insertion in the four-dimensional tree-level quantum gravity S matrix obeys the Virasoro-Ward identities of the energy momentum tensor of a two-dimensional conformal field theory ( CFT 2 ). Furthermore, the celestial sphere at Minkowskian null infinity plays the role of the Euclidean sphere of the CFT 2 , with the Lorentz group acting as the unbroken S L ( 2 , C ) subgroup.

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Kapec, Daniel, Mitra, Prahar, Raclariu, Ana-Maria, Strominger, Andrew. 2017-09-22. 2D Stress Tensor for 4D Gravity. https://doi.org/10.1103/physrevlett.119.121601

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