Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge transport through ultrasmall single and double Josephson
  junctions coupled to resonant modes of the electromagnetic environment   We have investigated charge transport in ultrasmall superconducting single
and double Josephson junctions coupled to resonant modes of the electromagnetic
environment. We observe pronounced current peaks in the transport
characteristics of both types of devices and attribute them to the process
involving simultaneous tunneling of Cooper pairs and photon emission into the
resonant modes. The experimental data is well reproduced with the theoretical
models.

21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin