Hamiltonian Approach to Poisson Lie T-Duality
  The Hamiltonian formalism offers a natural framework for discussing the notion of Poisson Lie T-duality. This is because the duality is inherent in the Poisson structures alone and exists regardless of the choice of Hamiltonian. Thus one can pose alternative dynamical systems possessing nonabelian T-duality. As an example, we find a dual Hamiltonian formulation of the O(3) nonlinear sigma-model. In addition, starting from a general quadratic Hamiltonian, we easily recover the known dynamical systems having Poisson Lie T-duality. 
A. Stern