Asymptotic entanglement capacity of the Ising and anisotropic Heisenberg   interactions
  We compute the asymptotic entanglement capacity of the Ising interaction ZZ, the anisotropic Heisenberg interaction XX + YY, and more generally, any two-qubit Hamiltonian with canonical form K = a XX + b YY. We also describe an entanglement assisted classical communication protocol using the Hamiltonian K with rate equal to the asymptotic entanglement capacity. 
A. M. Childs, D. W. Leung, F. Verstraete, G. Vidal