Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A micro-SQUID with dispersive readout for magnetic scanning microscopy   We have designed and characterized a micro-SQUID with dispersive readout for
use in low temperature scanning probe microscopy systems. The design features a
capacitively shunted RF SQUID with a tunable resonance frequency from 5 to 12
GHz, micrometer spatial resolution and integrated superconducting coils for
local application of magnetic fields. The SQUID is operated as a nonlinear
oscillator with a flux- and power-dependent resonance frequency. Measurements
for device characterization and noise benchmarking were carried out at 4 K. The
measured flux noise above 10 kHz at 4 K is $80\;\mathrm{n}\Phi_0
\mathrm{Hz}^{-1/2}$ at a bandwidth of 200 MHz. Estimations suggest that one can
benefit from parametric gain based on inherent nonlinearity of the Josephson
junction and reduce the flux noise to $30\;\mathrm{n}\Phi_0\mathrm{Hz}^{-1/2}$
at 100 mK, which corresponds to $7.5\;\mathrm{\mu_B Hz^{-1/2}}$ for a magnetic
moment located at the center of the pickup loop.

5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an