Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Reactive Scattering of Ultracold Atoms and Molecules:
  Universality and Chaotic Dynamics   A fundamental question in the study of chemical reactions is how reactions
proceed at a collision energy close to absolute zero. This question is no
longer hypothetical: quantum degenerate gases of atoms and molecules can now be
created at temperatures lower than a few tens of nanoKelvin. In this work we
consider the benchmark ultracold reaction between, the most-celebrated
ultracold molecule, KRb and K. For the first time we map out an accurate ab
initio ground state potential energy surface of the KRbK complex in full
dimensionality and report numerically exact quantum-mechanical reaction
dynamics. The distribution of rotationally resolved rates is shown to be
Poissonian. An analysis of the hyperspherical adiabatic potential curves
explains this statistical character revealing a chaotic distribution for the
short-range collision complex that plays a key role in governing the reaction
outcome. We compare this with a lighter system with a smaller density of states
(here the LiYbLi trimer) which displays random, and not chaotic, behavior.

0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th