Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Forcing inertial Brownian motors: efficiency and negative differential
  mobility   The noise-assisted, directed transport in a one-dimensional dissipative,
inertial Brownian motor of the rocking type that is exposed to an external bias
is investigated. We demonstrate that the velocity-load characteristics is
distinctly non-monotonic, possessing regimes with a {\em negative differential
mobility}. In addition, we evaluate several possible efficiency quantifiers
which are compared among each other. These quantifiers characterize the mutual
interplay between the viscous drag and the external load differently, weighing
the inherent rectification features from different physical perspectives.

9
The categories of this paper are: nlin
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an