Ermakov-Pinney equation in scalar field cosmologies

Rachael M. Hawkins, James E. Lidsey
2002 Physical Review D, Particles and fields  
It is shown that the dynamics of cosmologies sourced by a mixture of perfect fluids and self-interacting scalar fields are described by the non-linear, Ermakov-Pinney equation. The general solution of this equation can be expressed in terms of particular solutions to a related, linear differential equation. This characteristic is employed to derive exact cosmologies in the inflationary and quintessential scenarios. The relevance of the Ermakov-Pinney equation to the braneworld scenario is discussed.
doi:10.1103/physrevd.66.023523 fatcat:syxtqoah3bhhbndozln4wdkbtu