Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Aging or DEAD: origin of the non-monotonic response to weak
  self-propulsion in active glasses   Among amorphous states, glass is defined by relaxation times longer than the
observation time. This nonergodic nature makes the understanding of glassy
systems an involved topic, with complex aging effects or responses to further
out-of-equilibrium external drivings. In this respect active glasses made of
self-propelled particles have recently emerged as stimulating systems which
broadens and challenges our current understanding of glasses by considering
novel internal out-of-equilibrium degrees of freedom. In previous experimental
studies we have shown that in the ergodicity broken phase, the dynamics of
dense passive particles first slows down as particles are made slightly active,
before speeding up at larger activity. Here, we show that this nonmonotonic
behavior also emerges in simulations of soft active Brownian particles and
explore its cause. We refute that the Deadlock by Emergence of Active
Directionality (DEAD) model we proposed earlier describes our data. However, we
demonstrate that the nonmonotonic response is due to activity enhanced aging,
and thus confirm the link with ergodicity breaking. Beyond self-propelled
systems, our results suggest that aging in active glasses is not fully
understood.

35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat