Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interfacing light and single atoms with a lens   We characterize the interaction between a single atom or similar microscopic
system and a light field via the scattering ratio. For that, we first derive
the electrical field in a strongly focused Gaussian light beam, and then
consider the atomic response. Following the simple scattering model, the
fraction of scattered optical power for a weak coherent probe field leads to
unphysical scattering ratios above 1 in the strong focusing regime. A refined
model considering interference between exciting and scattered field into
finite-sized detectors or optical fibers is presented, and compared to
experimental extinction measurements for various focusing strengths.

15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin