Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Correlated emission lasing in harmonic oscillators coupled via a single
  three-level artificial atom   A single superconducting artificial atom provides a unique basis for coupling
electromagnetic fields and photons hardly achieved with a natural atom.
Bringing a pair of harmonic oscillators into resonance with transitions of the
three-level atom converts atomic spontaneous processes into correlated emission
dynamics. We demonstrate two-mode correlated emission lasing on harmonic
oscillators coupled via the fully controllable three-level artificial atom.
Correlation of two different color emissions reveals itself as equally narrowed
linewiths and quench of their mutual phase-diffusion. The mutual linewidth is
more than four orders of magnitude narrower than the Schawlow-Townes limit. The
interference between the different color lasing fields demonstrates the
two-mode fields are strongly correlated.

6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph