Worm algorithm calculate bose-Hubbard model at a customized graph

[LAZY1764]

When my input lattice is like this, the algorithm worked well.
<LATTICEGRAPH name = "square lattice 3x3"> <FINITELATTICE> <LATTICE ref="square lattice"/> <EXTENT dimension="1" size="3"/> <EXTENT dimension="2" size="3"/> <BOUNDARY dimension="1" type="open"/> <BOUNDARY dimension="2" type="open"/> </FINITELATTICE> <UNITCELL ref="simple2d"/> </LATTICEGRAPH>

But when it changed into a graph(without translation symmetry), the algorithm stopped.
<GRAPH name="triangle" vertices="3"> <EDGE type="0" source="1" target="2"/> <EDGE type="0" source="2" target="3"/> <EDGE type="0" source="3" target="1"/> </GRAPH>
And it returned :"Created run 1 locally
Cannot save a measurement of size 0."

[vws100]

The worm code does throw an error on graphs without translational invariance. One workaround would be to use LATTICE="triangular lattice";

Creating an issue to alert the user to restrict to lattices instead of graphs.

[LAZY1764]

What if I set the graph as a big unit cell and input L=W=1 ?

[vws100]

Yes, one workaround would be to use a triangle as a unit cell and set L=1. For example, if you want only 3 edges and 3 sites, you could update the kagome lattice to have open boundaries and choose L=1:

<LATTICEGRAPH name = "open kagome lattice">
  <FINITELATTICE>
    <LATTICE ref="triangular lattice"/>
    <PARAMETER name="W" default="L"/>
    <EXTENT dimension="1" size="L"/>
    <EXTENT dimension="2" size="W"/>
    <BOUNDARY type="open"/>
  </FINITELATTICE>
  <UNITCELL ref="Kagome"/>
</LATTICEGRAPH>