Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong magnon-photon coupling within a tunable cryogenic microwave
  cavity   The ability to achieve strong-coupling has made cavity-magnon systems an
exciting platform for the development of hybrid quantum systems and the
investigation of fundamental problems in physics. Unfortunately, current
experimental realizations are constrained to operate at a single frequency,
defined by the geometry of the microwave cavity. In this article we realize a
highly-tunable, cryogenic, microwave cavity strongly coupled to magnetic spins.
The cavity can be tuned in situ by up to 1.5 GHz, approximately 15% of its
original 10 GHz resonance frequency. Moreover, this system remains within the
strong-coupling regime at all frequencies with a cooperativity of approximately
800.

27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys