On 9 Nov 2017, at 14:12, Sun Rongyang <sun-rongyang@outlook.com> wrote:

Dear all,

The definition method of a lattice in ALPS is delicate. But I meet a problem about dimension counting of a pure graph. On the one hand, I define an pure anisotropic graph as:

*************************************************************************************************

<GRAPH name="anisotropic open ladder graph test">

    <!-- type="0" means horizontal; type="1" means vertical -->

    <EDGE tyep="0" source="1" target="2"/>

    <EDGE tyep="0" source="2" target="3"/>

    <EDGE tyep="0" source="3" target="4"/>

    <EDGE tyep="0" source="4" target="5"/>

    <EDGE tyep="0" source="6" target="7"/>

    <EDGE tyep="0" source="7" target="8"/>

    <EDGE tyep="0" source="8" target="9"/>

    <EDGE tyep="0" source="9" target="10"/>

    <EDGE tyep="1" source="1" target="6"/>

    <EDGE tyep="1" source="2" target="7"/>

    <EDGE tyep="1" source="3" target="8"/>

    <EDGE tyep="1" source="4" target="9"/>

    <EDGE tyep="1" source="5" target="10"/>

</GRAPH>

*************************************************************************************************

On the other hand, I use the default LATTICEGRAPH "open ladder", I copy here:

*************************************************************************************************

<LATTICE name="square lattice" dimension="2">

  <PARAMETER name="a" default="1"/>

  <BASIS><VECTOR>a 0</VECTOR><VECTOR>0 a</VECTOR></BASIS>

  <RECIPROCALBASIS><VECTOR>2*pi/a 0</VECTOR><VECTOR>0 2*pi/a</VECTOR></RECIPROCALBASIS>

</LATTICE>

<UNITCELL name="anisotropic2d" dimension="2">

  <VERTEX/>

  <EDGE type="0"><SOURCE vertex="1" offset="0 0"/><TARGET vertex="1" offset="1 0"/></EDGE>

  <EDGE type="1"><SOURCE vertex="1" offset="0 0"/><TARGET vertex="1" offset="0 1"/></EDGE>

</UNITCELL>

<LATTICEGRAPH name = "open ladder" vt_name="OpenLadderLattice">

  <FINITELATTICE>

    <LATTICE ref="square lattice"/>

    <PARAMETER name="W" default="2"/>

    <EXTENT dimension="1" size="L"/>

    <EXTENT dimension="2" size="W"/>

    <BOUNDARY dimension="1" type="open"/>

    <BOUNDARY dimension="2" type="open"/>

  </FINITELATTICE>

  <UNITCELL ref="anisotropic2d"/>

</LATTICEGRAPH>

*************************************************************************************************

with parameters L=2, W=5. Will they be treated as the same in ALPS? Or the graph equals as L=5,W=2 open ladder?

Thanks a lot!

Best regards,

Rongyang Sun

 

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