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arXiv · 2505.20084

Bulk Reconstruction of Scalar Excitations in Flat$_3$/CCFT$_2$ and the Flat Limit from (A)dS$_3$/CFT$_2$

Peng-Xiang Hao·Kotaro Shinmyo·Yu-ki Suzuki·Shunta Takahashi·Tadashi Takayanagi
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Abstract

We explore the reconstruction of bulk local states in three-dimensional flat spacetime (Flat$_3$) using states from two-dimensional Carrollian conformal field theories (CCFT$_2$), proposed as dual field theories in one lower dimension. For massive scalar-type bulk excitations, reconstruction is achieved through states in the induced representation. This method successfully reproduces the bulk massive scalar spectrum and the bulk-to-bulk propagator. Additionally, we identify a new flat limit from AdS$_3$ and dS$_3$ spacetimes, further validating our proposal for scalar reconstruction in Flat$_3$/CCFT$_2$.

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Peng-Xiang Hao, Kotaro Shinmyo, Yu-ki Suzuki, Shunta Takahashi, Tadashi Takayanagi. 2025-05-26. Bulk Reconstruction of Scalar Excitations in Flat$_3$/CCFT$_2$ and the Flat Limit from (A)dS$_3$/CFT$_2$. https://doi.org/10.1007/jhep11(2025)054

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