Collective effects in multi-field inflation

We present a new model of multi-field inflation in the limit when, N, the number of fields is very large. To implement this limit, we reformulate the problem in terms of a colourless bilocal field [(x; y) which encodes the collective degrees of freedom of the N scalar fields. As a concrete example, we apply the collective field theory formalism to the bosonic O(N) vector model with quartic self interaction minimally coupled to gravity and show how this may be used to model the quantum to classical transition out of inflation.

Grantor dc:publisher.institution

Department of Mathematics and Applied Mathematics

Year dc:date.issued

2013

Author dc:creator

• Hassan, Sultan

Advisors dc:contributor.advisor

• Murugan, Jeffrey
• Weltman, Amanda

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/6618

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/6618