Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleation and droplet growth from supersaturated vapor at temperatures
  below the triple point temperature   In 1897 Ostwald formulated his step rule for formation of the most stable
crystal state for a system with crystal polymorphism. The rule describes the
irreversible way a system converts to the crystal with lowest free energy. But
in fact the irreversible way a supercooled gas below the triple point
temperature $T_{tr.p.}$ crystallizes via a liquid droplet is an example of
Ostwald's step rule. The homogeneous nucleation in the supersaturated gas is
not to a crystal, but to a liquid-like critical nucleus. We have for the first
time performed constant energy (NVE) Molecular Dynamics (MD) of homogeneous
nucleation without the use of a thermostat. The simulations of homogeneous
nucleation in a Lennard-Jones system from supersaturated vapor at temperatures
below $T_{tr.p.}$ reveals that the nucleation to a liquid-like critical nucleus
is initiated by a small cold cluster [S. Toxvaerd, J. Chem. Phys. \textbf{143}
154705 (2015)]. The release of latent heat at the subsequent droplet growth
increases the temperature in the liquid-like droplet, which for not deep
supercooling and/or low supersaturation, can exceed $T_{tr.p.}$. The
temperature of the liquid-like droplet increases less for a low supersaturation
and remains below $T_{tr.p.}$, but without a crystallization of the droplet for
long times. The dissipation of the latent heat into the surrounding gas is
affected by a traditional MD thermostat, with the consequence that droplet
growth is different for (NVE) MD and constant temperature (NVT) MD.

27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys