Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relaxation in yield stress systems through elastically interacting
  activated events   We study consequences of long-range elasticity in thermally assisted dynamics
of yield stress materials. Within a two-dimensinal mesoscopic model we
calculate the mean-square displacement and the dynamical structure factor for
tracer particle trajectories. The ballistic regime at short time scales is
associated with a compressed exponential decay in the dynamical structure
factor, followed by a subdiffusive crossover prior to the onset of diffusion.
We relate this crossover to spatiotemporal correlations and thus go beyond
established mean field predictions.

32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat