Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge transfer in the cold Yb$^+$ + Rb collisions   Charge-transfer cold Yb$^+$ + Rb collision dynamics is investigated
theoretically using high-level {\it ab initio} potential energy curves, dipole
moment functions and nonadiabatic coupling matrix elements. Within the
scalar-relativistic approximation, the radiative transitions from the entrance
$A^1\Sigma^+$ to the ground $X^1\Sigma^+$ state are found to be the only
efficient charge-transfer pathway. The spin-orbit coupling does not open other
efficient pathways, but alters the potential energy curves and the transition
dipole moment for the $A-X$ pair of states. The radiative, as well as the
nonradiative, charge-transfer cross sections calculated within the $10^{-3}-10$
cm$^{-1}$ collision energy range exhibit all features of the Langevin ion-atom
collision regime, including a rich structure associated with centrifugal
barrier tunneling (orbiting) resonances. Theoretical rate coefficients for two
Yb isotopes agree well with those measured by immersing Yb$^+$ ion in an
ultracold Rb ensemble in a hybrid trap. Possible origins of discrepancy in the
product distributions and relations to previously studied similar processes are
discussed.

27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph