Hi, the simplest will be to express the DM term in terms of Sz, S+ and S- operators. Matthias On 12 Mar 2011, at 13:44, javad vahedi wrote:

Dear all

I am interested to simulate Heisenberg spin chain in the presence of Dzyaloshinsky-Moriya interaction, but I don't know how to prepare an input file with Dzyaloshinsky-Moriya interaction. Actually, I am going to run full-diagonalization. I would be most grateful if anyone could give me some hand. Thank you very much in advance

-- Best Regards Javad Vahedi,