Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flux-driven Josephson parametric amplifier for sub-GHz frequencies
  fabricated with side-wall passivated spacer junction technology   We present experimental results on a Josephson parametric amplifier tailored
for readout of ultra-sensitive thermal microwave detectors. In particular, we
discuss the impact of fabrication details on the performance. We show that the
small volume of deposited dielectric materials enabled by the side-wall
passivated spacer niobium junction technology leads to robust operation across
a wide range of operating temperatures up to 1.5 K. The flux-pumped amplifier
has gain in excess of 20 dB in three-wave mixing and its center frequency is
tunable between 540 MHz and 640 MHz. At 600 MHz, the amplifier adds 105 mK
$\pm$ 9 mK of noise, as determined with the hot/cold source method.
Phase-sensitive amplification is demonstrated with the device.

28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio