Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precursor-mediated crystallization process in suspensions of hard
  spheres   We report on a large scale computer simulation study of crystal nucleation in
hard spheres. Through a combined analysis of real and reciprocal space data, a
picture of a two-step crystallization process is supported: First dense,
amorphous clusters form which then act as precursors for the nucleation of
well-ordered crystallites. This kind of crystallization process has been
previously observed in systems that interact via potentials that have an
attractive as well as a repulsive part, most prominently in protein solutions.
In this context the effect has been attributed to the presence of metastable
fluid-fluid demixing. Our simulations, however, show that a purely repulsive
system (that has no metastable fluid-fluid coexistence) crystallizes via the
same mechanism.

29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin