Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-orbital and density-induced tunneling of bosons in optical
  lattices   We show that multi-orbital and density-induced tunneling have a significant
impact on the phase diagram of bosonic atoms in optical lattices. Off-site
interactions lead to density-induced hopping, the so-called bond-charge
interactions, which can be identified with an effective tunneling potential and
can reach the same order of magnitude as conventional tunneling. In addition,
interaction-induced higher-band processes also give rise to strongly modified
tunneling, on-site and bond-charge interactions. We derive an extended
occupation-dependent Hubbard model with multi-orbitally renormalized processes
and compute the corresponding phase diagram. It substantially deviates from the
single-band Bose-Hubbard model and predicts strong changes of the superfluid to
Mott-insulator transition. In general, the presented beyond-Hubbard physics
plays an essential role in bosonic lattice systems and has an observable
influence on experiments with tunable interactions.

18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int