Inflationary cosmology and braneworld scenarios

Physics

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Cosmology, Early Universe

Scientific paper

Cosmology has undergone a significant advance in recent years both observationally and theoretically. New high quality data from a host of Cosmic Microwave Background and high redshift surveys has provided strong support for the inflationary paradigm, which postulates that the universe expanded exponentially fast when it was a fraction of a second old. A key question that has arisen is the nature of the underlying physics that drove such a phase of accelerated expansion. An exciting theoretical development has been the realization that the standard model interactions may be confined to a four-dimensional brane, whereas gravitational interactions may also propagate through the extra dimensions. The radical proposal of the braneworld scenario is that our observable universe is a brane embedded in a higher-dimensional bulk. We will review some of the recent developments in this field.

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