Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective tunnelling of strongly interacting cold atoms in a double
  well potential   It is known that under resonance conditions, a group of strongly interacting
bosonic atoms, trapped in a double-well potential, mimics a single particle,
performing Rabi oscillations between the wells. By implication, all atoms need
to tunnel at roughly the same time, even though the Bose-Hubbard Hamiltonian
accounts only for one-atom-at-a-time transfers. We analyse the mechanism of
this collective behaviour, evaluate the Rabi frequencies in the process, and
discuss the limitation of this simple picture. In particular, is is shown that
the small rapid oscillations superimposed on the slow Rabi cycle, result from
splitting the transferred cluster at the sudden onset of tunnelling, and
disappear if tunnelling is turned on gradually.

12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph