Abstract
New approaches to inflationary cosmology have been developed which may ultimately solve the fine-tuning problem that plagues previous inflationary models. The distinctive feature is that the the inflationary phase transition is completed by bubble nucleation. The bubbles may lead to some interesting effects in the post-inflationary universe, including new seeds for galaxy formation and a unique gravitational wave signature.
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Steinhardt, P.J. (1991). Extended Inflationary Cosmology: A Primer. In: Sato, K., Audouze, J. (eds) Primordial Nucleosynthesis and Evolution of Early Universe. Astrophysics and Space Science Library, vol 169. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3410-1_23
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