Thesiss

This thesis explores the expansive world of General Relativity, and its role to play in modern cosmology and quantum field theory. We begin with a pedagogical approach to relativity, in particular, highlighting upon the ambiguity that arises with the conventions used in differen…

In the first part of this dissertation we study theories with several hundred (N) axion fields which are subject to a broad class of periodic potentials. We develop a new technique, based on the discovery of approximate symmetries and which uses the Lenstra-Lenstra-Lovász lattic…