Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exciton induced directed motion of unconstrained atoms in an ultracold
  gas   We demonstrate that through localised Rydberg excitation in a
three-dimensional cold atom cloud atomic motion can be rendered directed and
nearly confined to a plane, without spatial constraints for the motion of
individual atoms. This enables creation and observation of non-adiabatic
electronic Rydberg dynamics in atoms accelerated by dipole-dipole interactions
under natural conditions. Using the full $l=0,1$ $m=0,\pm1$ angular momentum
state space, our simulations show that conical intersection crossings are
clearly evident, both in atomic position information and excited state spectra
of the Rydberg system. Hence, flexible Rydberg aggregates suggest themselves
for probing quantum chemical effects in experiments on length scales much
inflated as compared to a standard molecular situation.

33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga