Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced magnetoassociation of $^6$Li in the quantum degenerate regime   We study magnetic Feshbach resonance of ultracold $^6$Li atoms in a dipole
trap close to quantum degeneracy. The experiment is carried out by linearly
ramping down the magnetic field from the BCS to the BEC side around the broad
resonance at $B_r=834.1$G. The Feshbach molecule formation efficiency depends
strongly on the temperature of the atomic gas and the rate at which the
magnetic field is ramped across the Feshbach resonance. The molecular
association process is well described by the Landau-Zener transition while
above the Fermi temperature, such that two-body physics dominates the dynamics.
However, we observe an enhancement of the atom-molecule coupling as the
Fermionic atoms reach degeneracy, demonstrating the importance of many-body
coherence not captured by the conventional Landau-Zener model. We develop a
theoretical model that explains the temperature dependence of the atom-molecule
coupling. Furthermore, we characterize this dependence experimentally and
extract the atom-molecule coupling coefficient as a function of temperature,
finding qualitative agreement between our model and experimental results.
Accurate measurement of this coupling coefficient is important for both
theoretical and experimental studies of atom-molecule association dynamics.

13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph