Aspects of dS/CFT holography by Indranil Dey, Kanhu Kishore Nanda, Akashdeep Roy, Sandip P. Trivedi

“…We argue that terms in the resulting correlation functions, which are independent of the late time cut-off, satisfy the Ward identities of a conformal field theory. We also discuss other ways to identify sources, both in the under damped and the over damped case, where M 2 R ds 2 < d 2 4 $$ {M}^2{R}_{ds}^2<\frac{d^2}{4} $$ , and argue that these too can lead to correlators satisfying the Ward identities of a CFT. …”
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