Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Connectivity transition in the frustrated S=1 chain revisited   The phase transition in the antiferromagnetic isotropic Heisenberg S=1 chain
with frustrating next-nearest neighbor coupling alpha is reconsidered. We
identify the order parameter of the large-alpha phase as describing two
intertwined strings, each possessing a usual string order. The transition has a
topological nature determined by the change in the string connectivity.
Numerical evidence from the DMRG results is supported by the effective theory
based on soliton states.

26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol