Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coupling electrodynamic fields to vibrational modes in helical
  structures   Helical structures like alpha helices, DNA, and microtubules have profound
importance in biology. It has been suggested that these periodic arrangements
of constituent units could support collective excitations similarly to
crystalline solids. Here, we examine the interaction between such constructs
and oscillating dipoles, and evaluate the role of the helicity in the coupling
between electrodynamic fields and vibrations. Based on a vibrational and
eigenfunction analyses we discover a group of modes of coherent oscillations
that give rise to a strong and delocalized response, selectivity in frequency,
and typical interaction range. To describe the field scattering due to the
structure vibrations we consider an anisotropic permittivity with a helical
periodicity, which applies to all vibration types and close dipole locations.
This new type of resonances identified here may help explain the role of
electrodynamic fields in the diverse functionality of cytoskeletal microtubules
in the cellular environment.

8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ