Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase dependent Andreev spectrum in a difusive SNS junction. Static and
  dynamic current response   A long phase coherent normal (N) wire between superconductors (S) is
characterized by a dense phase dependent Andreev spectrum. We investigate the
current response of Andreev states of an NS ring to a time dependent Aharonov
Bohm flux superimposed to a dc one. The ring is modeled with a tight binding
Hamiltonian including a superconducting region with a BCS coupling between
electron and hole states, in contact with a normal region with on site
disorder. Both dc and ac currents are determined from the computed eigenstates
and energies using a Kubo formula approach. Beside the well known Josephson
current we identify different contributions to the ac response. A low frequency
one related to the dynamics of the thermal occupations of the Andreev states
and a higher frequency one related to microwave induced transitions between
levels. Both are characterized by strongly anharmonic phase dependencies which
are nearly opposite to one another. Our findings are successfully compared to
the results of recent experiments.

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The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
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The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex