On brane cosmological solutions
H. K. Jassal (IUCAA, India)

TL;DR
This paper explores the cosmological implications of a five-dimensional two-brane Randall-Sundrum model, showing that the universe undergoes power-law expansion with scale factor proportional to t^{1/2} and that the branes move closer over time.
Contribution
It analyzes the cosmology of a time-dependent extra dimension in the two-brane Randall-Sundrum scenario, highlighting the power-law expansion and brane dynamics.
Findings
Universe expands as t^{1/2} in this model
The two branes tend to approach each other over time
Surface terms influence the four-dimensional effective action
Abstract
This paper presents some cosmological consequences of the five dimensional, two brane Randall-Sundrum brane scenario. The radius of the compact extra dimension is taken to be time dependent. It is shown that the cosmology consistent with the two brane Randall-Sundrum model is a power law expansion of the universe, with scale factor growing as . The two branes tend to move towards each other with time. Some comments are made on the contribution of surface terms in deriving the four dimensional effective action.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Galaxies: Formation, Evolution, Phenomena
