Bonn 2020 – wissenschaftliches Programm
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 1: Gravity: Classical and Quantum
MP 1.2: Vortrag
Montag, 30. März 2020, 12:20–12:40, H-HS VII
Riding on a Dark Bubble: Emergent de Sitter cosmology — •Souvik Banerjee1, Ulf Danielsson2, and Suvendu Giri2 — 1Julius-Maximilians-University Würzburg, Würzburg, Germany — 2Uppsala University, Uppsala, Sweden
I will discuss how dark energy can be realised using unstable AdS, with our universe riding an expanding bubble. Our proposal involves realising four dimensional effective gravity on a brane which mediates the decay from a non-supersymmetric five dimensional Anti deSitter false vacuum to a true vacuum. In this way, it is natural for a four dimensional observer to experience an effective positive cosmological constant coupled to matter and radiation, avoiding the need for scale separation or a fundamental de Sitter vacuum. I will in particular discuss the holographic interpretation with matter induced in this model by hanging strings. I will argue how our construction provides a new way to understand the cosmological horizon, and also the underlying deep implications for particle physics and black holes.