Gravity waves from cosmic bubble collisions

Abstract

Our local Hubble volume might be contained within a bubble that nucleated in a false vacuum with only two large spatial dimensions. We study bubble collisions in this scenario and find that they generate gravity waves, which are made possible in this context by the reduced symmetry of the global geometry. These gravity waves would produce B-mode polarization in the cosmic microwave background, which could in principle dominate over the inflationary background.

26 pages plus references, 5 figures; v2: references updated, agrees with published version

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• Flux Compactification
• Thermal derivation of the Coleman-De Luccia tunneling prescription
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Cited by in corpus (4)

• Schwinger effect in de Sitter space
• Inflation after False Vacuum Decay: Observational Prospects after Planck
• Limits on Entanglement Effects in the String Landscape from Planck and BICEP/Keck Data
• Forecasting constraints from the cosmic microwave background on eternal inflation