Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Glassy Dynamics of Simulated Polymer Melts: Coherent Scattering and Van
  Hove Functions Part II: Dynamics in the alpha-Relaxation Regime   Whereas the first part of this paper dealt with the relaxation in the
beta-regime, this part investigates the final (alpha) relaxation of a simulated
polymer melt consisting of short non-entangled chains above the critical
temperature Tc of mode-coupling theory (MCT). We monitor the intermediate
incoherent as well as the coherent chain and coherent melt scattering functions
over a wide range of wave numbers q. Upon approaching Tc the coherent
alpha-relaxation time of the melt increases strongly close to the maximum of
the static structure factor of the melt. At q corresponding to the radius of
gyration of the chain the melt relaxation time exhibits another maximum. The
temperature dependence of the relaxation times is well described by a power-law
with a q-dependent exponent in an intermediate temperature range. The
time-temperature superposition principle of MCT is clearly bourne out in the
whole range of wave numbers. An analysis of the alpha-decay using
Kohlrausch-Williams-Watts (KWW) functions reveals that the collective melt
KWW-stretching exponent and KWW-relaxation times are modulated with the
structure factor. Furthermore, both incoherent and coherent KWW-times approach
the large-q prediction of MCT at q comparable to the maximum of the structure
factor. At small q a power law with exponent -3 is found for the coherent chain
KWW-times similar to that of recent experiments.

8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an