Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Traveling wave parametric amplifier with Josephson junctions using
  minimal resonator phase matching   Josephson parametric amplifiers have become a critical tool in
superconducting device physics due to their high gain and quantum-limited
noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise
performance while allowing for significant increases in both bandwidth and
dynamic range. We present a TWPA device based on an LC-ladder transmission line
of Josephson junctions and parallel plate capacitors using low-loss amorphous
silicon dielectric. Crucially, we have inserted $\lambda/4$ resonators at
regular intervals along the transmission line in order to maintain the phase
matching condition between pump, signal, and idler and increase gain. We
achieve an average gain of 12\,dB across a 4\,GHz span, along with an average
saturation power of -92\,dBm with noise approaching the quantum limit.

14
The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph