Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron-hole imbalance in superconductor-normal metal mesoscopic
  structures   We analysed the electron-hole or, in another words, branch imbalance (BI) and
the related electric potential $V_{imb}$ which may arise in a mesoscopic
superconductor/normal metal (S/N) structure under non-equilibrium conditions in
the presence of a supercurrent. Non-equilibrium conditions can be created in
different ways: a) a quasiparticle current flowing between the N reservoirs; b)
a temperature gradient between the N reservoirs and no quasiparticle current.
It is shown that the voltage $V_{imb}$ oscillates with the phase difference
$\phi$. In a cross-geometry structure the voltage $V_{imb}$ arises in the
vertical branch and affects the conditions for a transition into the
$\pi$-state.

32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph