Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase-synchronous undersampling in nonlinear spectroscopy   We introduce the concept of phase-synchronous undersampling in nonlinear
spectroscopy. The respective theory is presented and validated experimentally
in a phase-modulated quantum beat experiment by sampling high phase modulation
frequencies with low laser repetition rates. The advantage of undersampling in
terms of signal quality and reduced acquisition time is demonstrated and
breakdown conditions are identified. The presented method is particularly
beneficial for experimental setups with limited signal/detection rates.

17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas