Work

Multiway Junction Conditions for Spacetimes with Multiple Boundaries

Year: 2024

Type: article

Abstract: We explore the construction of gluing together an arbitrary number of spacetimes along a common interface. This provides a general tool to construct new gravitational backgrounds with multiple boundaries. We derive junction conditions across the interface, in both Einstein gravity and dilaton gravity, using two methods (1) by developing a geometrical technique of introducing an auxiliary reverse extension manifold and (2) by the variational principle. Our junction condition works for both spacelike and timelike interfaces. We illustrate applications of the junction conditions in Jackiw-Teitelboim gravity and analyze their constraints on the allowed dilaton profile. We further comment on the geometry of a web of spacetime in the presence of multiple interfaces and its resemblance to Feynman diagrams.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.066021

Authors: Jia-Yin Shen, Cheng Peng, Li-Xin Li

Institutions: Peking University, Kavli Institute for Theoretical Sciences, Peng Huanwu Center for Fundamental Theory, University of Chinese Academy of Sciences

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Chinese Academy of Sciences, Fundamental Research Funds for the Central Universities

Awards: G2012042336, 中子星合并的相关物理问题研究, G4966918070