A Hamiltonian approach to the cohomogeneity one Ricci soliton equations
  We show how to view the equations for a cohomogeneity one Ricci soliton as a Hamiltonian system with a constraint. We investigate conserved quantities and superpotentials, and use this to find some explicit formulae for Ricci solitons not of K\"ahler type in five dimensions. 
Alejandro Betancourt de la Parra, Andrew S. Dancer, McKenzie Y. Wang
math.DG