Induced rotation from de Sitter-Godel-de Sitter phase transition
  Therotationofthecosmicobjectsisauniversalphenomenonanditsoriginisstillanopenquestion.Here a model for the origin of rotation is presented. After an investigation of the phase transition of a scalar field in de Sitter and G\"odel backgrounds, the motion of a test particle during the phase transitions is studied. Then using computer simulation for a congruence of particles, we show that although the local induced rotation is nonzero, the global rotation is below the observational limit. 
Sh. Khodabakhshi (Tehran U.), A. Shojai (Tehran U. & IPM, Tehran)
gr-qc hep-th