Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective scattering and oscillation modes of optically bound point
  particles trapped in a single mode waveguide field   Collective coherent scattering of laser light induces strong light forces
between polarizable point particles. These dipole forces are strongly enhanced
in magnitude and distance within the field of an optical waveguide so that at
low temperature the particles self-order in strongly bound regular patterns.
The stationary configurations typically exhibit super-radiant scattering with
strong particle and light confinement. Here we study collective excitations of
such self-consistent crystalline particle-light structures as function of
particle number and pump strength. Multiple scattering and absorption modify
the collective particle-field eigenfrequencies and create eigenmodes of
surprisingly complex nature. For larger arrays this often leads to dynamical
instabilities and disintegration of the structures even if additional damping
is present.

30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph