Equilibration of a scalar field theory: a comparison of methods

摘要: This thesis investigates tools to study the extreme and very dynamical environment created after a heavy ion collision. situation is well described by Colour Glass Condensate framework. In particular, this will investigate two di↵erent methods that are able work within such an environment, Classical-Statistical method 2 Particle Irreducible Method, aims compare contrast these analytically. A scalar 4 theory used implement discussion in order concentrate on core issues without added complications contained gauge as QCD. i Declaration I know meaning of plagiarism declare all thesis, save for which properly acknowledged, my own. Jason Myers ii Acknowledgements would like thank Heribert Weigert countless hours he spent helping me with was especially tough going through editing process. Furthermore his lecture notes honours course Relativistic Quantum Mechanics at University Cape Town were instrumental thesis. also Francois Gelis discussions we had. Finally thanks friends family support. Particular go Andrecia letting bounce ideas o↵ her, whether or not she listening, Alistair, Tinashe Alison moaning winging they put through. iii