Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unconventional magnon excitation by off-resonant microwaves   It is widely recognized that a physical system can only respond to a periodic
driving significantly when the driving frequency matches the normal mode
frequency of the system, which leads to resonance. Off-resonant phenomena are
rarely considered because of the difficulty to realize strong coupling between
physical systems and off-resonant waves. Here we examine the response of a
magnetic system to squeezed light and surprisingly find that the magnons are
maximally excited when the effective driving frequency is several orders of
magnitude larger than the resonant frequency. The generated magnons are
squeezed which brings the advantage of tunable squeezing through an external
magnetic field. Furthermore, we demonstrate that such off-resonant
quasi-particle excitation is universal in all the hybrid systems in which the
coherent and parametric interaction of bosons exists and that it is purely a
quantum effect, which is rooted in the quantum fluctuations of particles in the
squeezed vacuum. Our findings may provide an unconventional route to study
off-resonant phenomena and may further benefit the use of hybrid matter-light
systems in continuous variable quantum information.

22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
1
The categories of this paper are: cs