Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detecting the Kondo screening cloud in conductance measurements on
  quantum dots   The observation of the Kondo effect in quantum dots has provided new
opportunities to finally observe the controversial Kondo screening cloud. We
study how screening cloud effects appear in the conductance through a quantum
wire containing a quantum dot when the length of the wire is comparable to the
size of the screening cloud.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas