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Article overview
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A 2D Stress Tensor for 4D Gravity | Daniel Kapec
; Prahar Mitra
; Ana-Maria Raclariu
; Andrew Strominger
; | Date: |
1 Sep 2016 | Abstract: | We use the subleading soft-graviton theorem to construct an operator $T_{zz}$
whose insertion in the four-dimensional tree-level quantum gravity
$mathcal{S}$-matrix obeys the Virasoro-Ward identities of the energy momentum
tensor of a two-dimensional conformal field theory (CFT$_2$). 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 $SL(2,mathbb{C})$
subgroup. | Source: | arXiv, 1609.0282 | Services: | Forum | Review | PDF | Favorites |
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