Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Timescales of quantum equilibration, dissipation and fluctuation in
  nuclear collisions   Understanding the dynamics of equilibration processes in quantum systems as
well as their interplay with dissipation and fluctuation is a major challenge
in quantum many-body theory. The timescales of such processes are investigated
in collisions of atomic nuclei using fully microscopic approaches. Results from
time-dependent Hartree-Fock (TDHF) and time-dependent random-phase
approximation (TDRPA) calculations are compared for 13 systems over a broad
range of energies. The timescale for full mass equilibration
($\sim2\times10^{-20}$s) is found to be much larger than timescales for
neutron-to-proton equilibration, kinetic energy and angular momentum
dissipations which are on the order of $10^{-21}$s. Fluctuations of mass
numbers in the fragments and correlations between their neutron and proton
numbers build up within only a few $10^{-21}$s. This indicates that dissipation
is basically not impacted by mass equilibration, but is mostly driven by the
exchange of nucleons between the fragments.

24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org