Perturbative soft graviton theorems in de Sitter spacetime
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DOI: 10.1007/jhep12(2025)008
Abstract: We consider soft graviton scattering for a theory where Einstein’s gravity is minimally coupled to a scalar field in the presence of a cosmological constant, i.e. in a background de Sitter space. Employing a perturbative… read more here.
Keywords: graviton; theorems sitter; perturbative soft; sitter spacetime ... See more keywords
Asymptotic symmetries and the subleading soft graviton theorem in higher dimensions
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DOI: 10.1103/physrevd.104.064010
Abstract: We investigate the relation between the subleading soft graviton theorem and asymptotic symmetries in gravity in even dimensions higher than four. After rewriting the subleading soft graviton theorem as a Ward identity, we argue that… read more here.
Keywords: graviton theorem; asymptotic symmetries; soft graviton; subleading soft ... See more keywords
w_{1+∞} Algebra and the Celestial Sphere: Infinite Towers of Soft Graviton, Photon, and Gluon Symmetries.
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DOI: 10.1103/physrevlett.127.221601
Abstract: It is shown that the infinite tower of tree-level plus-helicity soft graviton symmetries in asymptotically flat 4D quantum gravity can be organized into a single chiral 2D Kac-Moody symmetry based on the wedge algebra of… read more here.
Keywords: towers soft; photon gluon; celestial sphere; gluon symmetries ... See more keywords