Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-local linear-response functions for thermal transport computed with
  equilibrium molecular-dynamics simulation   We establish an approach to compute linear-response functions to elucidate
heat waves and non-local thermal transport. The theory is able to describe the
response of a system to external heat sources that are nonuniform in space and
time. The response functions are computed using equilibrium molecular-dynamics
simulations of an Ar crystal modeled using the standard Lennard-Jones
potential. It is shown that for low temperatures and short length scales,
transport can be partially or even completely ballistic, with the response
primarily limited by the group velocity of lattice waves. By contrast, at
longer length scales and higher temperatures, the response functions correspond
more closely to diffusive transport characteristic of Fourier's law. It is also
shown how the effective thermal conductivity can be determined in a
partially-ballistic regime. The results demonstrate the known reduction in the
effective thermal conductivity observed when system dimensions are smaller than
the mean-free path for lattice waves. Finally, we show how determination of the
relevant response functions can be used to model heating of a crystal without
requiring additional atomic-scale simulations. Differences between computed
results and predictions from Fourier's law represent wave-like,
partially-ballistic transport.

13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
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