Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low temperature properties in the Bilayer Kitaev model   The ground state of the bilayer Kitaev model with the Heisenberg-type
interlayer exchange interaction is investigated by means of the exact
diagonalization. Calculating the ground-state energy, local quantity defined on
each plaquette, and dynamical spin structure factor, we obtain results
suggesting the existence of a quantum phase transition between the Kitaev
quantum spin liquid (QSL) and dimer singlet states when the interlayer coupling
is antiferromagnetic. On the other hand, increasing the ferromagnetic
interlayer coupling, there exists no singularity in the physical quantities,
suggesting that the $S=1/2$ Kitaev QSL state realized in each layer
adiabatically connects to another QSL state realized in the $S=1$ Kitaev model.
Thermodynamic properties are also studied by means of the thermal pure quantum
state method.

1
The categories of this paper are: cs
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys