Hi Aniket,

The answer is simple: add a line like

S=2

to the parameters. However there should generally be no need, since the value of S can just be absorbed into the coupling constant.

Best regards

Matthias

On 29 Mar 2007, at 20:50, aniket@jncasr.ac.in wrote:

Respected sir, I am new user of ALPS. So can I ask you one query?

How change the value of S in 1D Heisenberg model?

Hamiltonian for 1D Heisenberg model

H = sum (S(i)*S(j))

description

here H is the Hamiltonian

sum means summation over all i & j.

S(i) and S(j) means i & j th spin.

by default S value is 1 for classical CONVENTION. how change this value (other than 1)?

I am running alps-application/tutorial/classical2/parm2a file.

( for convenience I am attaching URL also http://alps.comp-phys.org:16080/mediawiki-1.9.3/index.php/ Tutorial:ClassicalMCSimulations#The_one-dimensional_Heisenberg_chain )

I am waiting for your reply.

Regards, Aniket