# Bulk dual of CFT on dS The conformal boundary of an asymptotically AdS spacetime can be quite general, including one that contains a de Sitter factor, i.e. dS${}_n\times\mathcal{M}$ for some $\mathcal{M}$. There has been a lot of interest in this because this provides a [[0001 AdS-CFT|holographic]] study of de Sitter. If boundary is $dS_{d-1} \times S^1$, which is the analytic continuation of $S^{d-1}\times S^1$, the bulk dual has two Euclidean solutions, with $S^{d-1}$ pinching off or $S^1$ pinching off. For the former, it analytically continues to a topological BH, and for the latter it gives a [[0168 Bubble of nothing|bubble of nothing]]. See [[2010#Marolf, Rangamani, van Raamsdonk]] for details. More general situations can be found in [[0231 Bulk solutions for CFTs on non-trivial geometries|this page]]. Note that this has nothing to do with [[0251 dS-CFT|dS/CFT]] where one looks for a boundary description of dS rather than a bulk one.