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Eternal Inflation, past and future
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Eternal Inflation, past and future
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Cosmological inflation, if it occurred, radically alters the picture of the `big bang', which would merely point to reheating at the end of inflation. Moreover, this reheating may be only local, so that inflation continues elsewhere and forever, continually spawning big-bang-like regions. This chapter reviews this idea of `eternal inflation', then focuses on what this may mean for the ultimate beginning of the universe. In particular, I will argue that given eternal inflation, the universe may be free of a cosmological initial singularity, might be eternal (and eternally inflating) to the past, and might obey an interesting sort of cosmological time-symmetry.
Forward citations
Cited by 2 Pith papers
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A late-time bubble of lower dark energy density can mimic DESI BAO features, but CMB dipole, kSZ, and sound-horizon constraints exclude the required parameters.
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Ensemble-averaged bubble profiles and decay rates from zero-temperature lattice simulations match Coleman instantons computed in a one-parameter renormalized effective potential, not the bare potential.
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