Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graphene-based Josephson junction microwave bolometer   Sensitive microwave detectors are critical instruments in radioastronomy,
dark matter axion searches, and superconducting quantum information science.
The conventional strategy towards higher-sensitivity bolometry is to
nanofabricate an ever-smaller device to augment the thermal response. However,
this direction is increasingly more difficult to obtain efficient photon
coupling and maintain the material properties in a device with a large
surface-to-volume ratio. Here we advance this concept to an ultimately thin
bolometric sensor based on monolayer graphene. To utilize its minute electronic
specific heat and thermal conductivity, we develop a
superconductor-graphene-superconductor (SGS) Josephson junction bolometer
embedded in a microwave resonator of resonant frequency 7.9 GHz with over 99\%
coupling efficiency. From the dependence of the Josephson switching current on
the operating temperature, charge density, input power, and frequency, we
demonstrate a noise equivalent power (NEP) of 7 $\times 10^{-19}$ W/Hz$^{1/2}$,
corresponding to an energy resolution of one single photon at 32 GHz and
reaching the fundamental limit imposed by intrinsic thermal fluctuation at 0.19
K.

17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga