The End of Cosmic Growth

Understand

The growth of large scale structure is a battle between gravitational attraction and cosmic acceleration.

• We investigate the future behavior of cosmic growth under both general relativity (GR) and modified gravity during prolonged acceleration, deriving analytic asymptotic behaviors and showing that gravity generally loses and growth ends.
• We also note the `why now' problem is equally striking when viewed in terms of the shut down of growth.
• For many models inside GR the gravitational growth index $\gamma$ also shows today as a unique time between constant behavior in the past and a higher asymptotic value in the future.