## Inflation and String TheoryThe past two decades have seen transformative advances in cosmology and string theory. Observations of the cosmic microwave background have revealed strong evidence for inflationary expansion in the very early universe, while new insights about compactifications of string theory have led to a deeper understanding of inflation in a framework that unifies quantum mechanics and general relativity. Written by two of the leading researchers in the field, this complete and accessible volume provides a modern treatment of inflationary cosmology and its connections to string theory and elementary particle theory. After an up-to-date experimental summary, the authors present the foundations of effective field theory, string theory, and string compactifications, setting the stage for a detailed examination of models of inflation in string theory. Three appendices contain background material in geometry and cosmological perturbation theory, making this a self-contained resource for graduate students and researchers in string theory, cosmology, and related fields. |

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adiabatic anti-D3-branes approximation arXiv astro-ph astro-ph.CO axion background backreaction brane Calabi–Yau Calabi–Yau manifold complex structure moduli compute conifold constant constraints corresponding cosmic strings cosmological coupling curvature perturbations D3-brane DBI inflation defined density dilaton dimensions dynamics effective action effective field theory effective theory energy equations of motion eta problem Euclidean D3-branes evolution example expansion F-term fluctuations flux compactifications four-dimensional Goldstone boson hep-th inflation in string inflationary inflaton interactions JHEP Kähler moduli Kähler potential Lagrangian leading low-energy manifold mass metric modes moduli stabilization monodromy multi-field non-Gaussianity nonperturbative nontrivial NS5-brane orientifold parameter particle physics Planck Planck mass power spectrum primordial quantum gravity reheating scalar fields scale scenario Section sector shift symmetry single-field Sitter Vacua slow-roll inflation solution space spacetime string compactifications string theory supergravity superpotential supersymmetry breaking ten-dimensional tensor type IIB ultraviolet completion vacuum volume worldsheet Δφ