Two dimensional nearly de Sitter gravity

By J. Maldacena, G. Turiaci, Zhenbin Yang. Journal of High Energy Physics, 2019

203 citations recorded by the source corpus.

We study some aspects of the de Sitter version of Jackiw-Teitelboim gravity. Though we do not have propagating gravitons, we have a boundary mode when we compute observables with a fixed dilaton and metric at the boundary. We compute the no-boundary wavefunctions and probability measures to all orders in perturbation theory. We also discuss contributions from different topologies, borrowing recent results by Saad, Shenker and Stanford. We discuss how the boundary mode leads to gravitational corrections to cosmological observables when we add matter. Finally, starting from a four dimensional gravity theory with a positive cosmological constant, we consider a nearly extremal black hole and argue that some observables are dominated by the two dimensional nearly de Sitter gravity dynamics.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/50cbe8e1ec3ad2a9338092f51ede46cc10e89273

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. D. Stanford
2. R. Myers
3. J. Maldacena
4. S. Shenker
5. G. Turiaci
6. Thomas Hartman
7. D. Harlow
8. Phil Saad

In Nuclear and High Energy Physics

1. D. Stanford
2. R. Myers
3. J. Maldacena
4. S. Shenker
5. G. Turiaci
6. Phil Saad
7. Zhenbin Yang
8. D. Harlow

In Statistical and Nonlinear Physics

1. D. Stanford
2. Phil Saad
3. S. Shenker
4. G. Turiaci
5. J. Maldacena
6. R. Myers
7. Thomas Hartman
8. Zhenbin Yang

Citations in the corpus

• The path integral of 3D gravity near extremality; or, JT gravity with defects as a matrix integral (2020, background): “For a dilaton potential with a certain shape it is possible to produce flows where the geometry inside the bulk is dS2 (see also [85, 36]).”
• Islands in cosmology (2020, background): “ider two-dimensional de Sitter spacetime in JT gravity [75,76]. The action is S= ˚ 0 16ˇG Z d2x p gR+ 1 16ˇG d2x g˚(R 2); (7.1) where we have left out boundary terms. For details about this model see [77,78]. The rst term (combined with a boundary term) is purely topological and will not play a role”
• Replica wormholes and the black hole interior (2019, methodology): “, with R= 2. Next, we integrate over the moduli space of hyperbolic metrics, and over the space of \boundary wiggles," which represent the shape of the cuto within the parent hyperbolic manifold [48]. Finding true solutions appears to involve two complications: rst, in order to nd on-shell solu”
• Bra-ket wormholes in gravitationally prepared states (2020, background): “motivation in mind, we set out to study a very simple two dimensional toy model for in ation. We consider de Sitter JT gravity [10,11] coupled to matter consisting of a conformal eld theory (see also [12,13].) To the future of the de Sitter region, we imagine a at space region with no gravity, see g”
• The statistical mechanics of near-BPS black holes (2020, methodology): “Extremal black holes in such theories typically preserve a smaller amount of supersymmetry; for instance, in AdS4, such black holes exhibit an OSp(2|2) isometry in Similar considerations are also useful in computing quantum corrections to the Hartle-Hawking wavefunction in dS [106].”
• Quantum extremal islands made easy. Part I. Entanglement on the brane (2020, background): “Let us add that this would be similar to upcoming work of [125, 126], which studies related questions in the context of JT gravity with a positive cosmological constant [127].”
• JT gravity and the ensembles of random matrix theory (2019, background): “Further work has included generalizations to include higher spin fields [29], supersymmetry [30], different topologies [31, 32, 23, 26], and de Sitter space [33, 34].”
• Low-dimensional de Sitter quantum gravity (2019, unknown): “borate on this below. 3.1.3 Complex metrics Here we elaborate on the Maldacena contour perspective on the metric formulation of nearlydS 2 gravity. This discussion has signicant overlap with that of [22]. That is, we can deform the time coordinate of the nearly-dS 2 metric congurations along a compl”
• Late Time Correlation Functions, Baby Universes, and ETH in JT Gravity (2019, background): “We are typically interested in quantities that involve imposing asymptotically AdS boundary conditions, but we may also include (19)These topology changing effects were studied in [14, 29, 51, 52] and discussed in [40, 41].”