Do we live on the End of the World?

Abstract

We propose a scenario of a de Sitter universe living on an End-of-the-World brane. Motivated by the Swampland programme and in particular the Cobordism Conjecture, we consider a compact region of AdS${}_5$ nucleating from nothing, with a dS${}_4$ living on its boundary. We show that it can equivalently be interpreted as an up-tunnelling from AdS${}_5$ with cosmological constant $\Lambda \to -\infty$, following Brown and Dahlen's proposal for 'nothing'. Their picture naively leads to the conclusion that the brane has infinite negative tension. But we show that it becomes finite and positive once we employ holographic renormalization, recovering the Bubble of Something where the domain wall becomes a boundary of spacetime. The same holds true in any number of dimensions and, moreover, at the level of metric perturbations. This provides motivation for alternative routes of obtaining cosmology from quantum gravity or string theory using domain walls, departing from conventional vacuum approaches.

arXiv comment31 pages, 1 figure; references added

References in corpus (51)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• An Alternative to Compactification
• de Sitter Vacua in String Theory
• The Holographic Weyl anomaly
• Holographic Reconstruction of Spacetime and Renormalization in the AdS/CFT Correspondence
• Lecture Notes on Holographic Renormalization
• The Einstein Equations on the 3-Brane World
• Supergravity description of field theories on curved manifolds and a no go theorem
• Distance and de Sitter Conjectures on the Swampland
• Bounds on Slow Roll and the de Sitter Swampland
• Bent Domain Walls as Braneworlds
• What if string theory has no de Sitter vacua?
• The Gravitational Action in Asymptotically AdS and Flat Spacetimes
• AdS and the Swampland
• Holography and the Weyl anomaly
• The landscape, the swampland and the era of precision cosmology
• On the de Sitter swampland criterion
• On the Existence of Meta-stable Vacua in Klebanov-Strassler
• De Sitter vs Quintessence in String Theory
• Explicit de Sitter Flux Vacua for Global String Models with Chiral Matter
• Towards de Sitter from 10D
• Building an explicit de Sitter
• Constraining de Sitter Space in String Theory
• Nonperturbative Instability of AdS_5 x S^5/Z_k
• The asymptotic dS Swampland Conjecture - a simplified derivation and a potential loophole
• Constraints on String Cosmology
• Generalized Friedmann branes
• Cosmic acceleration from asymmetric branes
• Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory
• de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds
• Infra-red modification of gravity from asymmetric branes
• Quintessence and the Swampland: The parametrically controlled regime of moduli space
• On de Sitter String Vacua from Anti-D3-Branes in the Large Volume Scenario
• de Sitter Cosmology on an expanding bubble
• Dynamical Cobordism Conjecture: Solutions for End-of-the-World Branes
• The $F$-term Problem and other Challenges of Stringy Quintessence
• On 'Nothing'
• Quintessence and the Swampland: The numerically controlled regime of moduli space
• Asymmetric brane-worlds with induced gravity
• Higher-curvature Gravities from Braneworlds and the Holographic c-theorem
• Dark bubbles: decorating the wall
• On de Sitter Spacetime and String Theory
• Obstacles to Constructing de Sitter Space in String Theory
• A stringy realization of a small and positive cosmological constant in dark bubble cosmology
• On Measuring Distances in the Quantum Gravity Landscape
• Dark bubbles and black holes
• de Sitter Minima from M theory and String theory
• Features of a dark energy model in string theory
• Shedding light on dark bubble cosmology
• Over-extremal brane shells from string theory?
• Charged Nariai black holes on the dark bubble