Titlebook: Exploring the Early Universe with Gravitational Waves; Laura Bianca Bethke Book 2015 Springer International Publishing Switzerland 2015 An

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Chiral Tensor Power Spectrum from Quantum Gravity,Quantum fluctuations that are produced during inflation freeze out after leaving the horizon and can survive until today, as was described in Sect. ..

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Concluding Remarks,In this thesis, I have demonstrated that gravitational waves can be used as powerful probes of the early universe. I focussed on two separate topics, tensor perturbations from inflation within a quantum gravity formalism, and gravitational waves from preheating in the presence of a light scalar field.

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978-3-319-36909-9Springer International Publishing Switzerland 2015

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Laura Bianca BethkeNominated as an outstanding Ph.D. thesis by Imperial College London.Includes a thorough introduction covering all topics needed to understand this research field.Provides detailed explanations of how

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Anisotropic Gravitational Wave Background from Massless Preheating,uring this period, we still do not know for sure how the process occurred. Although reheating might have an effect on the curvature perturbation [.], the main constraint to date comes from the abundance of light elements which give bounds on the reheating temperature after thermalisation [.]. Howeve