2020
DOI: 10.1007/jhep06(2020)048
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Low-dimensional de Sitter quantum gravity

Abstract: We study aspects of Jackiw-Teitelboim (JT) quantum gravity in two-dimensional nearly de Sitter (dS) spacetime, as well as pure de Sitter quantum gravity in three dimensions. These are each theories of boundary modes, which include a reparameterization field on each connected component of the boundary as well as topological degrees of freedom. In two dimensions, the boundary theory is closely related to the Schwarzian path integral, and in three dimensions to the quantization of coadjoint orbits of the Virasoro… Show more

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Cited by 130 publications
(197 citation statements)
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References 128 publications
(252 reference statements)
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“…Meanwhile, holographic descriptions of the realistic case of bulk de Sitter geometry [15,[18][19][20][21][22][23][24][25][26][27][28][29][30] have developed significantly. In particular, patches of de Sitter spacetime, including the dS/dS patch covering more than an observer region, arise from appropriate generalizations of the TT deformation [9][10][11][12] as explained recently in [15,28].…”
Section: Jhep04(2020)152 Introductionmentioning
confidence: 99%
“…Meanwhile, holographic descriptions of the realistic case of bulk de Sitter geometry [15,[18][19][20][21][22][23][24][25][26][27][28][29][30] have developed significantly. In particular, patches of de Sitter spacetime, including the dS/dS patch covering more than an observer region, arise from appropriate generalizations of the TT deformation [9][10][11][12] as explained recently in [15,28].…”
Section: Jhep04(2020)152 Introductionmentioning
confidence: 99%
“…In this section we analyse the possibility of giving a dS 2 or more general cosmological interpretation for the WdW wavefunctions, after discussing the various possibilities for analytically continuing the AdS 2 results. 28 A similar analysis in the context of JT-gravity can be found in [31][32][33].…”
Section: Jhep09(2020)125 6 Comments On the Cosmological Wavefunctionsmentioning
confidence: 67%
“…In section 6, we analyse a possible cosmological interpretation of the wavefunctions, as WdW wavefunctions of two-dimensional universes. In order to do so we follow the analytic continuation procedure in the field space proposed and studied in [25,[31][32][33], that involves what one might call "negative AdS 2 , trumpet geometries". In our description this corresponds to using loops of imaginary parameter z = i .…”
Section: Jhep09(2020)125mentioning
confidence: 99%
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“…This spacetime is dS 2 and it appears in the near horizon region of black holes in de Sitter space whose Schwarzschild radius is pushed towards the de Sitter horizon, again in any spacetime dimension. These are known as Nariai black holes [15,16], and their holography has also received some interest [17,18] (see [19][20][21][22][23][24] for recent work relevant to dS 2 ).…”
Section: Introductionmentioning
confidence: 99%