Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Early time evolution of Freedericks patterns generated from states of
  electroconvection   We report on the early time ordering in a nematic liquid crystal subjected to
a sudden change in external ac electric field. We compare time evolution for
two different initial states of electroconvection. Electroconvection is a
highly driven state of a nematic liquid crystal involving convective motion of
the fluid and periodic variations of the molecular alignment. By suddenly
changing either the voltage or the frequency of the applied ac field, the
system is brought to the same thermodynamic conditions. The time ordering of
the system is characterized by the evolution of features of the power spectrum,
including the average wavenumber, total power, and shape of the the power
spectrum. The differences between the two classes of quenches are discussed, as
well as the possibility of scaling behavior during this initial phase of domain
growth.

22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math