Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conductance suppression in normal metal-superconductor mesoscopic
  strucutres   Using a scattering matrix approach and quasiclassical Green's function
technique, we calculate the conductance of the S/N system (see Fig.1). We
establish that the difference between the superconducting and normal state
conductance $(\delta G = G_s - G_n)$ is negative for large S/N interface
resistances $(R_{S/N})$ and changes sign with decreasing $R_{S/N}$. The
comparision of the result obtained with experimental data is carried out.

32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ