Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Momentum Jumps in Quasi-2D Ballistic Systems   It is shown that the depopulation of magnetoelectric subbands of ballistic
electrons in quasi-2D systems, due to an increased magnetic field parallel to
the 2D electron gas plane, produces a momentum jump of the ballistic electrons
in a direction transverse to the magnetic field. The present technological
achievements allow the observation of this new phenomenon, which can be used to
implement qubit states or electron switches

12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs