Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Second-order photon correlation measurement with picosecond resolution   The second-order correlation function of light $g^{(2)}(\tau)$ constitutes a
pivotal tool to quantify the quantum behavior of an emitter and in turn its
potential for quantum information applications. The experimentally accessible
time resolution of $g^{(2)}(\tau)$ is usually limited by the jitter of
available single photon detectors. Here, we present a versatile technique
allowing to measure $g^{(2)}(\tau)$ from a large variety of light signals with
a time resolution given by the pulse length of a mode-locked laser. The
technique is based on frequency upconversion in a nonlinear waveguide, and we
analyze its properties and limitations by modeling the pulse propagation and
the frequency conversion process .We measure $g^{(2)}(\tau)$ from various
signals including light from a quantum emitter - a confined exciton-polariton
structure - revealing its quantum signatures at a scale of a few picoseconds
and demonstrating the capability of the technique.

17
The categories of this paper are: q-fin
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The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org