Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatially sequential turn-on of spontaneous emission from an atomic wave
  packet   We discuss a simple example demonstrating that spontaneous emission from
"space-time-superposed" atomic center-of-mass wave packets is nontrivially and
time-dependent modified with respect to the standard dipole-pattern typical of
"space-superposed" wave packets. Our approach provides an approximate
description of a nonsimultaneous interaction of electromagnetic field with
different parts of a wave packet.

32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc