Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heat flux in one-dimensional systems   Understanding heat transport in one-dimensional systems remains a major
challenge in theoretical physics, both from the quantum as well as from the
classical point of view. In fact, steady states of one-dimensional systems are
commonly characterized by macroscopic inhomogeneities, and by long range
correlations, as well as large fluctuations that are typically absent in
standard three-dimensional thermodynamic systems. These effects violate
locality --material properties in the bulk may be strongly affected by the
boundaries, leading to anomalous energy transport-- and they make more
problematic the interpretation of mechanical microscopic quantities in terms of
thermodynamic observables. Here, we revisit the problem of heat conduction in
chains of classical nonlinear oscillators, following a Lagrangian and an
Eulerian approach. The Eulerian definition of the flux is composed of a
convective and a conductive component. The former component tends to prevail at
large temperatures where the system behavior is increasingly gas-like. Finally,
we find that the convective component tends to be negative in the presence of a
negative pressure.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph