Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Purification of Single Photons from Room-Temperature Quantum Dots   Single photon emitters are indispensable to photonic quantum technologies.
Here we demonstrate waveform-controlled high-purity single photons from
room-temperature colloidal quantum dots. The purity of the single photons does
not vary with the excitation power, thereby allowing the generation rate to be
increased without compromising the single-photon quality.

22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys