Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single-photon-level light storage in cold atoms using the Autler-Townes
  splitting protocol   Broadband spin-photon interfaces for long-lived storage of photonic quantum
states are key elements for quantum information technologies. Yet, reliable
operation of such memories in the quantum regime is challenging due to photonic
noise arising from technical and/or fundamental limitations in the
storage-and-recall processes controlled by strong electromagnetic fields. Here,
we experimentally implement a single-photon-level spin-wave memory in a
laser-cooled Rubidium gas, based on the recently proposed Autler-Townes
splitting (ATS) protocol. We demonstrate storage of 20-ns-long laser pulses,
each containing an average of 0.1 photons, for 200 ns with an efficiency of
$12.5\%$ and signal-to-noise ratio above 30. Notably, the robustness of ATS
spin-wave memory against motional dephasing allows for an all-spatial filtering
of the control-field noise, yielding an ultra-low unconditional noise
probability of $3.3\times10^{-4}$, without the complexity of spectral
filtering. These results highlight that broadband ATS memory in ultracold atoms
is a preeminent option for storing quantum light.

18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga