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Open AccessNotes on wormhole cancellation and factorization
In AdS/CFT, partition functions of decoupled CFTs living on separate asymptotic boundaries factorize. However, the presence of bulk wormholes connecting different boundaries tends to spoil the factorization of...
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Open AccessTwisting asymptotic symmetries and algebraically special vacuum solutions
In this paper, we study asymptotic symmetries and algebraically special exact solutions in the Newman-Penrose formalism. Removing the hypersurface orthogonal condition in the well studied Newman-Unti gauge, we...
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Article
Open AccessAsymptotic Weyl double copy in Newman-Penrose formalism
In this paper, we provide a self-contained investigation of the Weyl double copy in the Newman-Penrose formalism. We examine the Weyl double copy constraints for the general asymptotically flat solution in the...
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Open AccessSoft theorems in de Sitter spacetime
In this paper, we derive a soft photon theorem and a soft gluon theorem in the de Sitter spacetime from the Ward identity of the near cosmological horizon large gauge transformation. Taking the flat limit of t...
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Open AccessNotes on self-dual gravity
In this paper, we study self-dual gravity in the Newman-Penrose formalism. We specify the self-dual solution space from the Newman-Unti solutions. We show that the asymptotic symmetries of the self-dual gravit...
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Open AccessSymmetries at causal boundaries in 2D and 3D gravity
We study 2d and 3d gravity theories on spacetimes with causal (timelike or null) codimension one boundaries while allowing for variations in the position of the boundary. We construct the corresponding solution p...
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Open AccessNear horizon gravitational charges
In this paper, we study the near horizon symmetry and gravitational charges in the Newman-Penrose formalism. In particular we investigate the effect from topological terms. We find that the Pontryagin term and...
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Open AccessNote on the asymptotic structure of Kerr-Schild form
The Kerr-Schild form provides a natural way of realizing the classical double copy that relates exact solutions in general relativity to exact solutions in gauge theory. In this paper, we examine the asymptoti...
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Article
Open AccessRemarks on infinite towers of gravitational memories
An infinite tower of gravitational memories was proposed in [1] by considering the matter-induced vacuum transition in the impulsive limit. We give an alternative realization of the infinite towers of gravitat...
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Open AccessAsymptotic structure of Einstein-Maxwell-dilaton theory and its five dimensional origin
We consider Einstein-Maxwell-dilaton theory in four dimensions including the Kaluza-Klein theory and obtain the general asymptotic solutions in Bondi gauge. We find that there are three different types of news...
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Open AccessMore on gravitational memory
Two novel results for the gravitational memory effect are presented in this paper. We first extend the formula for the memory effect to solutions with arbitrary two surface boundary topology. The memory effect...
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Open AccessBMS supertranslations and not so soft gravitons
In a previous article [1], we have argued that Low’s sub-leading soft photon theorem can be recovered as a Ward identity associated to the same large gauge transformations that control the leading piece of the th...
