Title- dS2 as excitation of AdS2
We introduce a family of 2D dilaton gravity models with state-dependent constant curvature so that dS2 emerges as an excitation of AdS2. Curiously, the strong coupling region corresponds to the asymptotic region geometrically. Apart from these key differences, many features resemble the Almheiri–Polchinski model. We discuss perturbative and non-perturbative thermodynamical stability, bubble nucleation through matter shockwaves, and semiclassical backreaction effects. In some of these models, we find that low temperatures are dominated by AdS2 but high temperatures are dominated by dS2, concurrent with a recent proposal by Susskind.
Ecker, Florian; Grumiller, Daniel; and McNees, Robert, "dS2 as excitation of AdS2" (2022). Physics: Faculty Publications and Other Works. 103.
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