Johnson, Matthew C.2015-08-282015-08-282015-05-112015-08-28http://hdl.handle.net/10315/30129The theory of inflation was introduced to resolve many existing observational problems in cosmology. Inflation becomes eternal when a region of space continuously spawns non-inflation regions. This process arises from metastable vacua in a potential landscape. Our universe could be a realization of one of these many vacua predicted by the theory. In this thesis, we explored the idea that a universe can be born via a collision between two bubble universes. This process is known as a ``Classical Transition''. In this thesis, the potential observability of relics produced during the collision is studied. If a classical transition did happen in the past, its presence is imprinted on the CMB temperature anisotropy.enAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.PhysicsAstrophysicsElectronic Thesis or Dissertation2015-08-28CosmologyBubble CollisionClassical TransitionCMB Signature