Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Field-induced Bose-Einstein condensation and supersolid in the
  two-dimensional Kondo necklace   We report our numerical calculation using two-dimensional tensor network
ansatz, infinite projected entangled-pair state (iPEPS), on the 2D
Kondo-necklace model where a local spin-singlet phase can be realized. By
introducing an external magnetic field, the singlet-triplet gap reduces and
eventually closes, leading to the well-known triplon condensation. Moreover,
after introducing XXZ anisotropy, this model gives rise to a field-induced
supersolid before entering a fully polarized phase. In 3D, the Kondo-sieve
model is regarded as the spin Hamiltonian for
$\text{Ba}_2\text{NiO}_2\text{(AgSe)}_2$ (BNOAS), and thus we believe our
numerical estimation can be realized and provide a new platform for such exotic
field-induced condensation. Finally, we propose a $t$-$J$-$K$ many-body
Hamiltonian that is appropriate for exploring the expected superconductivity
upon doping electrons into BNOAS.

8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an