4.7 Article

Soft gravity by squaring soft QED on the celestial sphere

期刊

PHYSICAL REVIEW D
卷 103, 期 8, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.103.085016

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资金

  1. European Research Council (ERC) Starting Grant [757978]
  2. Villum Fonden [15369]

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The authors reinterpret the soft S matrices as correlation functions of certain two-dimensional models of topological defects and point out the double-copy structure between the soft photon and soft graviton cases. They propose a putative classical double copy between the corresponding topological models and rederive gauge invariance and the equivalence principle as Ward identities of the two-dimensional theories.
We recast the soft S matrices on the celestial sphere as correlation functions of certain two-dimensional models of topological defects. In pointing out the double-copy structure between the soft photon and soft graviton cases, we arrive at a putative classical double copy between the corresponding topological models and a rederivation of gauge invariance and the equivalence principle as Ward identities of the two-dimensional theories.

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