You need to define a lattice that has edges of one type between nearest neighbors and of another type to next nearest neighbors.

Matthias

On 11 Oct 2014, at 19:21, Niraj Ghimire <niraj.ghimire@gmail.com> wrote:

> Dear alps users/developers,
>           I am trying to study the properties of a system using a Hamiltonian that has terms describing nearest-neighbor and next-nearest-neighbor interactions. I am thinking I can do so by simply using one of the Hamiltonians described in "models.xml" but I don't know how. I went through all the tutorials given on the alps homepage but found no help. I will truly appreciate any help or guidance.
>
> Thank you,
> Niraj