Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kitaev's exact solution approximated   For 25 years condensed matter physicists have searched for a material that
realizes a macroscopic quantum state of matter, the quantum spin liquid. Recent
experiments show that the necessary interaction may be found in a family of
hexagonal ruthenium based materials.

29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th