Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of an external electric field on the energy dissipation at the
  initial stage of laser ablation   A density-dependent two-temperature model is applied to describe laser
excitation and the following relaxation processes of silicon in an external
electric field. Two approaches on how to describe the effects of the external
electric field are presented. The first approach avoids the buildup of internal
electric fields due to charge separation by assuming ambipolar diffusion and
adds an additional carrier-pair current. In the second approach, electrons and
holes are treated separately to account for charge separation and the resulting
shielding of the external electric field inside the material. The two
approaches are compared to experimental results. Both the first approach and
the experimental results show similar tendencies for optimization of laser
ablation in the external electric field.

25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph