Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temporal imaging for ultra-narrowband few-photon states of light   Plenty of quantum information protocols are enabled by manipulation and
detection of photonic spectro-temporal degrees of freedom via light-matter
interfaces. While present implementations are well suited for high-bandwidth
photon sources such as quantum dots, they lack the high resolution required for
intrinsically narrow-band light-atom interactions. Here, we demonstrate
far-field temporal imaging based on ac-Stark spatial spin-wave phase
manipulation in a multimode gradient echo memory. We achieve spectral
resolution of 20 kHz with MHz-level bandwidth and ultra-low noise equivalent to
0.023 photons, enabling operation in the single-quantum regime.

29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph