Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetically tuned, robust and efficient filtering system for spatially
  multimode quantum memory in warm atomic vapors   Warm atomic vapor quantum memories are simple and robust, yet suffer from a
number of parasitic processes which produce excess noise. For operating in a
single-photon regime precise filtering of the output light is essential. Here
we report a combination of magnetically tuned absorption and Faraday filters,
both light-direction-insensitive, which stop the driving lasers and attenuate
spurious fluorescence and four-wave mixing while transmitting narrowband Stokes
and anti-Stokes photons generated in write-in and readout processes. We
characterize both filters with respect to adjustable working parameters. We
demonstrate a significant increase in the signal to noise ratio upon applying
the filters seen qualitatively in measurements of correlation between the
Raman-scattered photons.

31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph