Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bound states and entanglement generation in waveguide quantum
  electrodynamics   We investigate the behavior of two quantum emitters (two-level atoms)
embedded in a linear waveguide, in a quasi-one-dimensional configuration. Since
the atoms can emit, absorb and reflect radiation, the pair can spontaneously
relax towards an entangled bound state, under conditions in which a single atom
would instead decay. We analyze the properties of these bound states, which
occur for resonant values of the interatomic distance, and discuss their
relevance with respect to entanglement generation. The stability of such states
close to the resonance is studied, as well as the properties of non resonant
bound states, whose energy is below the threshold for photon propagation.

24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol