Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical package for QFT calculations of defect-induced phenomena in
  graphene   We introduce a computationally efficient method based on the path integral
formalism to describe defect-modified graphene. By taking into account the
entire Brillouin zone, our approach respects the lattice symmetry and can be
used to investigate both short-range and long-range effects. The proposed
method's key advantage is that the computational complexity does not increase
with the system size, scaling, instead, with the number of defects. As a
demonstration of our method, we explore the graphene-mediated RKKY interaction
between multiple magnetic impurities. Our results concur with earlier findings
by showing that the interaction strength and sign depend on various factors
like impurity separation, sublattice arrangement, and system doping. We
demonstrate that frustration can be introduced between the impurity spins by
controlling their relative positions and that this frustration can be switched
on and off by tuning the chemical potential of the system.

23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th