Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modal "self-coupling" as a sensitive probe for nanomechanical detection   We present a high-sensitivity measurement technique for mechanical
nanoresonators. Due to intrinsic nonlinear effects, different flexural modes of
a nanobeam can be coupled while driving each of them on resonance. This
mode-coupling scheme is dispersive and one mode resonance shifts with respect
to the motional amplitude of the other. The same idea can be implemented on a
{\it single} mode, exciting it with two slightly detuned signals. This two-tone
scheme is used here to measure the resonance lineshape of one mode through a
frequency shift in the response of the device. The method acts as an
amplitude-to-frequency transduction which ultimately suffers only from phase
noise of the local oscillator used and of the nanomechanical device itself. We
also present a theory which reproduces the data without free parameters.

33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph