Eternal inflation and the present universe

Abstract

Eternally inflating universes can contain thermalized regions with different values of the cosmological parameters. In particular, the spectra of density fluctuations should be different, because of the different realizations of quantum fluctuations of the inflaton field. I discuss a general method for calculating probability distributions for such variable parameters and analyse the density fluctuation spectrum as a specific application.

Talk given at QG99, Sardinia, Sept. 1999

References in corpus (1)

• Unambiguous probabilities in an eternally inflating universe

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• Cosmological Measures without Volume Weighting
• Susskind's Challenge to the Hartle-Hawking No-Boundary Proposal and Possible Resolutions
• Rejuvenating the hope of a swampland consistent inflated multiverse with tachyonic inflation in the high energy RS-II Braneworld
• No-Bang Quantum State of the Cosmos
• Breathing Comoving Hubble: Initial Condition and Eternity in view of the trans-Planckian Censorship Conjecture
• Slow-roll versus stochastic slow-roll inflation
• Tunneling in a quantum field theory on a compact one-dimensional space
• Eternal inflation near inflection points: a challenge to primordial black hole models