Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nanodiamonds with photostable, sub-gigahertz linewidths quantum emitters   Single photon emitters with narrow linewidths are highly sought after for
applications in quantum information processing and quantum communications. In
this letter, we report on a bright, highly polarized near infrared single
photon emitter embedded in diamond nanocrystals with a narrow, sub GHz optical
linewidths at 10K. The observed zero phonon line at ~ 780 nm is optically
stable under low power resonant excitation and blue shifts as the excitation
power increases. Our results highlight the prospect for using new near infrared
color centers in nanodiamonds for quantum applications.

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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph