Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bidirectional wavelength tuning of semiconductor quantum dots as
  artificial atoms in an optical resonator   We consider a pair of artificial atoms with different ground state energies.
By means of finite element calculations we predict that the ground state
energies can be tuned into resonance if the artificial atoms are placed into a
flexible ring structure, which is elastically deformed by an external force.
This concept is experimentally verified by embedding a low density of
self-assembled quantum dots into the wall of a rolled up micro tube ring
resonator. We demonstrate that quantum dots can elastically be tuned in- and
out of resonance with each other or with the ring resonator modes.

30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin