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dS$\boldsymbol{_2}$ as excitation of AdS$\boldsymbol{_2}$

by Florian Ecker, Daniel Grumiller, Robert McNees

Submission summary

As Contributors: Daniel Grumiller · Robert McNees
Arxiv Link: (pdf)
Date submitted: 2022-04-29 21:00
Submitted by: McNees, Robert
Submitted to: SciPost Physics
Academic field: Physics
  • Gravitation, Cosmology and Astroparticle Physics
  • High-Energy Physics - Theory
Approach: Theoretical


We introduce a family of 2D dilaton gravity models with state-dependent constant curvature so that dS$_2$ emerges as an excitation of AdS$_2$. 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 AdS$_2$ but high temperatures are dominated by dS$_2$, concurrent with a recent proposal by Susskind.

Current status:
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Submission 2204.00045v1 on 29 April 2022

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