Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-classical properties of the e.m. near field of an atom in
  spontaneous light emission   We use Glauber's correlation function function as well as the Green functions
formalism to investigate, in the case of a dipolar atomic transition, the
causal behaviour of the spontaneously emitted electromagnetic field. We also
examine the role played by the longitudinal electric field, which is not
described in terms of photonic (transverse) degrees of freedom. We predict the
existence of a genuinely quantum memory effect at the level of the near field
surrounding the atom, which keeps track of the past excitation and emission by
the atom.

20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
7
The categories of this paper are: hep-th