Giovanni Mazzarella — Università di Padova #
Ultracold atomic bosons in double, triple, and four-well potentials #
We consider ultracold atomic bosons confined in double, and triple, and
four- well shaped potentials.
We study such systems within the framework of the (two,three, four-site)
Bose-Hubbard model. By varying the atom-atom interaction, we investigate
the bosonic ground state. This latter exhibits a variety of forms ranging
from the coherent state in the delocalization regime to a macroscopic
cat-like (in the case of two and three spatial modes) and two-pulse states
(four-site configuration) with (quasi)-fully localized populations.