Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optomechanical coupling between a multilayer graphene mechanical
  resonator and a superconducting microwave cavity   The combination of low mass density, high frequency, and high quality-factor
of mechanical resonators made of two-dimensional crystals such as graphene make
them attractive for applications in force sensing/mass sensing, and exploring
the quantum regime of mechanical motion. Microwave optomechanics with
superconducting cavities offers exquisite position sensitivity and enables the
preparation and detection of mechanical systems in the quantum ground state.
Here, we demonstrate coupling between a multilayer graphene resonator with
quality factors up to 220,000 and a high-$\textit{Q}$ superconducting cavity.
Using thermo-mechanical noise as calibration, we achieve a displacement
sensitivity of 17 fm/$\sqrt{\text{Hz}}$. Optomechanical coupling is
demonstrated by optomechanically induced reflection (OMIR) and absorption
(OMIA) of microwave photons. We observe 17 dB of mechanical microwave
amplification and signatures of strong optomechanical backaction. We extract
the cooperativity $C$, a characterization of coupling strength, quantitatively
from the measurement with no free parameters and find $C=8$, promising for the
quantum regime of graphene motion.

10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn