What is the future of causal models of cosmic structure formation?

Details What is the future of causal models of cosmic structure formation? What is the future of causal models of cosmic structure formation?

1998-02-11

arxiv.org/abs/astro-ph/9802135v3

Astronomy and Astrophysics

Astrophysics

10 Pages including 4 postscipt figures. To appear in the proceedings of the "International Workshop on Particle Physics and th

Scientific paper

Recent research has severely constrained the standard ``defect'' models of cosmic structure formation. Here I discuss the nature of the problems with defect models, and place this discussion in the context of the big picture of cosmic structure formation. In particular, I classify models of cosmic structure formation as either ``causal'' or ``acausal'', and ask whether the problems with the defect models extend to all other causal models. I argue that determining the causal nature of the primordial perturbations is within the reach of modern cosmology, and that such a determination would yield deep insights into the very early Universe.

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