Dear Andrea, Currently, ALPS lattice and model libraries do not support long-range interactions, though you can simulate such models by specifying a graph with N(N-1)/ 2 bonds with different bond types for different bond lengths (and it will take O(N^2) CPU time). Or, I can send you our QMC code used in Fukui and Todo (2009) if you want. Best, Synge On 2009/08/21, at 17:45, Andrea Taroni wrote:

Dear All,

Is there a straightforward way to simulate the classical inverse- square Ising model using ALPS? By straightforward, I mean using the kind of recipe that is described in the tutorials section of the APLS applications website.

I am interested in comparing any eventual results with those presented by Fukui and Todo J. Comp. Phys. 228, 2629 (2009), using a novel order-N cluster MC method.

Thanks in advance!

Andrea