Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Josephson radiation in a superconductor-quantum dot-superconductor
  junction   We investigate the Josephson radiation emitted by a junction made of a
quantum dot coupled to two conventional superconductors. Close to resonance,
the particle-hole symmetric Andreev states that form in the junction are
detached from the continuum above the superconducting gap in the leads, while a
gap between them opens near the Fermi level. Under voltage bias, we formulate a
stochastic model that accounts for non-adiabatic processes, which change the
occupations of the Andreev states. This model allows calculating the current
noise spectrum and determining the Fano factor. Analyzing the finite-frequency
noise, we find that the model may exhibit either an integer or a fractional AC
Josephson effect, depending on the bias voltage and the size of the gaps in the
Andreev spectrum. Our results assess the limitations in using the fractional
Josephson radiation as a probe of topology.

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The categories of this paper are: hep-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph