Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interaction-induced magnetoresistance: From the diffusive to the
  ballistic regime   We study interaction-induced quantum correction to the conductivity tensor of
electrons in two dimensions for arbitrary T tau, where T is the temperature and
tau the transport mean free time. A general formula is derived, expressing the
correction in terms of classical propagators ("ballistic diffusons"). The
formalism is used to calculate the interaction contribution to the
magnetoresistance in a classically strong transverse field and smooth disorder
in the whole range of temperatures from the diffusive (T tau<<1) to the
ballistic (T tau>1) regime.

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The categories of this paper are: hep-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
16
The categories of this paper are: stat