On 28 Jan 2012, at 06:06, 潘丽华 wrote:

Dear Matthias or all users community,

I am wondering if the ALPS DMRG code in the version 1.3.2 can be applied to quasi-one dimensional Heisenberg chain with Periodic Boundary condition.

Best Regards For You!

Sincerely,

Lihua Pan

Yes, in principle it can but DMRG is much less efficient with periodic boundary conditions. It needs longer to converge and more states. I would also recommend upgrading to ALPS 2.0 since especially the DMRG code has become much faster. Matthias