On 13 Aug 2014, at 20:55, Stone, Matthew B. <stonemb@ornl.gov> wrote:

Thank you for the response regarding my prior question regarding the dimerized chain.

To follow up, I would like to ask a few more novice questions.

Does the DMRG ALPS routine calculate the momentum for one-dimensional systems?

No, and actually open systems don't have well defined momenta

Does the following unitcell definition have the appropriate open boundary conditions for efficient use of the DMRG routines?
<UNITCELL name="anisotropic1d" dimension="1">
<VERTEX/>
<EDGE type="0">
    <SOURCE vertex="1" offset="0"/>
    <TARGET vertex="2" offset="0"/>
</EDGE>
<EDGE type="1">
    <SOURCE vertex="2" offset="0"/>
    <TARGET vertex="1" offset="1"/>
</EDGE>
</UNITCELL>

This unit cell looks okay, but the open boundary conditions are set in the lattice and not in the unit cell.

Thank you,
Matthew Stone