Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin Hamiltonian for which the Chiral Spin Liquid is the Exact Ground
  State   We construct a Hamiltonian that singles out the chiral spin liquid on a
square lattice with periodic boundary conditions as the exact and, apart from
the two-fold topological degeneracy, unique ground state.

21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ