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Article overview
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Recycling universe | Jaume Garriga
; Alexander Vilenkin
; | Date: |
26 Jul 1997 | Journal: | Phys.Rev. D57 (1998) 2230-2244 | Subject: | astro-ph gr-qc | Abstract: | If the effective cosmological constant is non-zero, our observable universe may enter a stage of exponential expansion. In such case, regions of it may tunnel back to the false vacuum of an inflaton scalar field, and inflation with a high expansion rate may resume in those regions. An ``ideal’’ eternal observer would then witness an infinite succession of cycles from false vacuum to true, and back. Within each cycle, the entire history of a hot universe would be replayed. If there were several minima of the inflaton potential, our ideal observer would visit each one of these minima with a frequency which depends on the shape of the potential. We generalize the formalism of stochastic inflation to analyze the global structure of the universe when this `recycling’ process is taken into account. | Source: | arXiv, astro-ph/9707292 | Services: | Forum | Review | PDF | Favorites |
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