Observational analysis demonstrates scalar reconstruction in Flat 3 with new flat limit, indicating potential theoretical advances in CCFT 2.
A bstract 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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Hao et al. (2025) studied this question.
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