Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Renormalization Approach to Two-Dimensional Quantum
  Antiferromagnets with Valence-Bond-Solid Type Ground State   We study the ground-state properties of the two-dimensional quantum spin
systems having the valence-bond-solid (VBS) type ground states. The
``product-of-tensors'' form of the ground-state wavefunction of the system is
utilized to associate it with an equivalent classical lattice statistical model
which can be treated by the transfer-matrix method. For diagonalization of the
transfer matrix, we employ the product-wavefunction renormalization group
method which is a variant of the density-matrix renormalization group method.
We obtain the correlation length and the sublattice magnetization accurately.
For the anisotropically ``deformed'' S=3/2 VBS model on the honeycomb lattice,
we find that the correlation length as a function of the deformation parameter
behaves very much alike as that in the S=3/2 VBS chain.

16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex