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Anisotropic Gravitational Wave Background from Massless Preheating

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Exploring the Early Universe with Gravitational Waves

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Abstract

Reheating is one of the least understood periods in the early universe. While nearly all the elementary particles we observe must have been produced during this period, we still do not know for sure how the process occurred. Although reheating might have an effect on the curvature perturbation [1], the main constraint to date comes from the abundance of light elements which give bounds on the reheating temperature after thermalisation [2]. However, as was shown in Sect. 1.4, the detailed preheating dynamics strongly depend on the underlying model of inflation. Therefore, studying observables that were affected by the reheating process would give us insight into this period as well as inflation.

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  1. Blackett Laboratory, Theoretical Physics Group, Imperial College London, London, UK

    Laura Bianca Bethke

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  1. Laura Bianca Bethke
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Correspondence to Laura Bianca Bethke .

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Bethke, L.B. (2015). Anisotropic Gravitational Wave Background from Massless Preheating. In: Exploring the Early Universe with Gravitational Waves. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-17449-5_3

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