Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Memory in the aging of a polymer glass   Low frequency dielectric measurements on plexiglass (PMMA) show that cooling
and heating the sample at constant rate give an hysteretic dependence on
temperature of the dielectric constant $\epsilon$. A temporary stop of cooling
produces a downward relaxation of $\epsilon$. Two main features are observed i)
when cooling is resumed $\epsilon$ goes back to the values obtained without the
cooling stop (i.e. the low temperature state is independent of the cooling
history) ii) upon reheating $\epsilon$ keeps the memory of the aging history
({\it Memory}). The analogies and differences with similar experiments done in
spin glasses are discussed.

31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph