The following code:
using ITensors
using ITensorNetworks
using NamedGraphs
using Graphs
n =2
g = NamedGraph(path_graph(n))
s = siteinds("S=1/2", g)
ops = OpSum()
ops += 1.0, "Sz", 1, "Sz", 2
@show TTN(ops, s)
produces the error:
Which goes away if one names the vertices of g as tuples instead of Integers.
Is this unexpected? Or is TTN() only defined for IndexNetworks labelled with tuples?
The following code:
produces the error:
Which goes away if one names the vertices of
gas tuples instead of Integers.Is this unexpected? Or is
TTN()only defined forIndexNetworkslabelled with tuples?