Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral densities of Kondo impurities in nanoscopic systems   We present results for the spectral properties of Kondo impurities in
nanoscopic systems. Using Wilson's renormalization group we analyze the
frequency and temperature dependence of the impurity spectral density for
impurities in small systems that are either isolated or in contact with a
reservoir. We have performed a detailed analysis of the structure of the
impurity spectral density for energies around the Fermi energy for different
Fermi energies relative to the intrinsic structure of the local density of
states. We show how the electron confinement energy scales introduce new
features in the frequency and temperature dependence of the impurity spectral
properties.

17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph