Transformations between Jordan and Einstein frames: Bounces, antigravity, and crossing singularities
Transformations between Jordan and Einstein frames: Bounces, antigravity, and crossing singularities
We study the relation between the Jordan-Einstein frame transition and the possible description of the crossing of singularities in flat Friedmann universes, using the fact that the regular evolution in one frame can correspond to crossing singularities in the other frame. We show that some interesting effects arise in simple …