Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical absorption in atoms and molecules near laser-induced exceptional
  points   We present a non-Hermitian theory of atomic and molecular absorption, which
enables computing the absorption spectrum of multi-electron atoms and molecules
without using any fitting parameters. We propose a method for optically
inducing exceptional points in atomic systems, and show that slight changes in
the laser parameters may lead to dramatic changes in the absorption lineshape.
We demonstrate these predictions for helium using exact ab-initio
electronic-structure data. Finally, we derive a simple formula for the Fano
asymmetry factor and evaluate it for a model xenon atom.

28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph