Hi,

you write target="j" and this will go through all edges on the lattice graph. For more details please look at the documentation:

http://alps.comp-phys.org/mediawiki/index.php/Tutorials:LatticeHOWTO http://alps.comp-phys.org/mediawiki/index.php/Tutorials:ModelHOWTO

Matthias

On 25 Mar 2014, at 07:46, Tianyou YI cielyty@msn.com wrote:

Hello, I need to create my own Hamiltonian. I have a term of nearest-neighbor interaction, and I write in the model file

</BONDTERM> <BONDTERM source="i" target="j"> -t*bdag(i)*b(j) </BONDTERM> Here in the field of the target should I write target="i+1" or should I write simply target="j". What is the difference between the two cases ? In the second case, the source i will go through all the sites and the target j will go through alll the sites too, I have then interaction of next-nearest-neighbor terms and so on ? Thank you for your reply. Best wishes Tianyou