Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse-Magnetic Billiards on a Square   We consider a polygon in a two-dimensional plane with a homogeneous constant
magnetic field orthogonal to such plane, but inside the polygon, the magnetic
field is zero. We study the dynamics of an electron with an initial velocity in
this setting. Problems arise because we have a boundary with corners. In the
square case, we generalize velocities with a rational slope and show numerical
evidence of a chaotic-like behavior with other initial conditions.

19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs