Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Drag and Hall drag in a bi-layer system with pinholes   The transresistance and the Hall transresistance of dirty two-dimensional
bi-layer systems in the presence of tunneling bridges (pinholes) are studied
theoretically. We find, at weak magnetic field, a non-zero Hall
transresistance. In a geometry where the pinholes are concentrated in the
middle of the sample, a quantum process gives the dominant contribution to both
the ordinary transresistance and the Hall transresistance. Arising from the
interplay between Coulomb repulsion, disorder and tunneling, the quantum
contribution increases in a singular way as the temperature decreases.

23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol