Authors construct canonical and path-integral quantizations for QFT in Klein space using extra modes, deriving correlation functions that match Minkowski space via analytical continuation.
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Modular-flow generators for celestial CFT and Klein CFT are obtained as linear combinations of global SL(2,C)/SO(2,2) and supertranslation generators that preserve interval endpoints.
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QFT in Klein space
Authors construct canonical and path-integral quantizations for QFT in Klein space using extra modes, deriving correlation functions that match Minkowski space via analytical continuation.
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Modular Flow of Celestial Conformal Field Theory
Modular-flow generators for celestial CFT and Klein CFT are obtained as linear combinations of global SL(2,C)/SO(2,2) and supertranslation generators that preserve interval endpoints.