03209nam 22005055 450 991033788140332120200702075437.03-030-19507-410.1007/978-3-030-19507-6(CKB)4100000008618222(MiAaPQ)EBC5813656(DE-He213)978-3-030-19507-6(PPN)23848971X(EXLCZ)99410000000861822220190708d2019 u| 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierFundamental Aspects of Asymptotic Safety in Quantum Gravity /by Zoë H. Slade1st ed. 2019.Cham :Springer International Publishing :Imprint: Springer,2019.1 online resource (143 pages)Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053"Doctoral thesis accepted by the University of Southampton, Southampton, UK"--Title page.3-030-19506-6 Introduction -- Solutions to the reconstruction problem -- Background independence in a background dependent RG -- Asymptotic solutions in asymptotic safety -- Outlook.After an extensive introduction to the asymptotic safety approach to quantum gravity, this thesis explains recent key advances reported in four influential papers. Firstly, two exact solutions to the reconstruction problem (how to recover a bare action from the effective average action) are provided. Secondly, the fundamental requirement of background independence in quantum gravity is successfully implemented. Working within the derivative expansion of conformally reduced gravity, the notion of compatibility is developed, uncovering the underlying reasons for background dependence generically forbidding fixed points in such models. Thirdly, in order to understand the true nature of fixed-point solutions, one needs to study their asymptotic behaviour. The author carefully explains how to find the asymptotic form of fixed point solutions within the f(R) approximation. Finally, the key findings are summarised and useful extensions of the work are identified. The thesis finishes by considering the need to incorporate matter into the formalism in a compatible way and touches upon potential opportunities to test asymptotic safety in the future.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053GravitationCosmologyClassical and Quantum Gravitation, Relativity Theoryhttps://scigraph.springernature.com/ontologies/product-market-codes/P19070Cosmologyhttps://scigraph.springernature.com/ontologies/product-market-codes/P22049Gravitation.Cosmology.Classical and Quantum Gravitation, Relativity Theory.Cosmology.530.143531.14Slade Zoë Hauthttp://id.loc.gov/vocabulary/relators/aut837227BOOK9910337881403321Fundamental Aspects of Asymptotic Safety in Quantum Gravity1870617UNINA