On 28 Jun 2007, at 08:57, John Single wrote:
Hello,
I am having a little difficulty understanding the tutorialfor ALPS version 2. Is their a difference between the rectangular lattice and square lattice? If we set the coupling itself in 2d(J0 and J1) then does relative distance matter or is distance and coupling strength two separate factors that make up an effective coupling strength?
-Thanks, John
We do not have any ALPS version 2 yet. Do you mean ALPS 1.2 or ALPS 1.3? The distance does not enter anywhere.
The way it works is that you define different bond types in the lattice (e.g. type 0,1,2) and then define Hamiltonian terms for each bond type. These terms can have different coupling constants (e.g. J0 and J1). There is a shortcut for that in version 1.3 and that's why I first need to know which version you are referring to.
Matthias