Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Floquet phonon lasing in multimode optomechanical systems   Dynamical radiation pressure effects in cavity optomechanical systems give
rise to self-sustained oscillations or `phonon lasing' behavior, producing
stable oscillators up to GHz frequencies in nanoscale devices. Like in photonic
lasers, phonon lasing normally occurs in a single mechanical mode. We show here
that phase-locked, multimode phonon lasing can be established in a multimode
optomechanical system through Floquet dynamics induced by a temporally
modulated laser drive. We demonstrate this concept in a suitably engineered
silicon photonic nanocavity coupled to multiple GHz-frequency mechanical modes.
We find that the long-term frequency stability is significantly improved in the
multimode lasing state as a result of the phase locking. These results provide
a path towards highly stable ultra-compact oscillators, pulsed phonon lasing,
coherent waveform synthesis, and emergent many-mode phenomena in oscillator
arrays.

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The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat