Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport through Double-Dots coupled to normal and superconducting
  leads   We study transport through double quantum dots coupled to normal and
superconducting leads, where the Andreev reflection plays a key role in
determining characteristic transport properties. We shall discuss two typical
cases, i.e. double dots with serial or parallel geometry. For the parallel
geometry, the interference of electrons via multiple paths is induced, so that
the transmission probability has Fano-type dip structures which are symmetric
with respect to the Fermi energy. We also investigate the Aharonov-Bohm(AB)
effect for the parallel geometry. In some particular situations, we find that
the general AB period for double dots, 4$\pi$, is reduced to 2$\pi$.

11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess