Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improving the optomechanical entanglement and cooling by photothermal
  force   Cooling and Entanglement in optomechanical systems coupled through radiation
pressure and photothermal force is studied. To develop the photothermal model,
we derive an expression for deformation constant of the force. Exploiting
linearized quantum Langevin equations we investigate dynamics of such systems.
According to our analysis, in addition to separate action of radiation pressure
and photothermal force, their cross correlation effect plays an important role
in dynamics of the system. We also achieve an exact relation for the phonon
number of the mechanical resonator in such systems, and then we derive an
analytical expression for it at weak coupling limit. At strong coupling regime,
we show that utilizing the photothermal pressure makes the ground state cooling
more approachable. The effect of photothermal force on the optomechanical
entanglement is investigated in detail. According to our exact numerical and
approximate analytical studies, even though the photothermal force is naturally
a dissipative force, it can improve the optomechanical entanglement both
quantitatively and qualitatively.

9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio