Speaker
Dr
Giovanni Mazzarella
(Università di Padova)
Description
We consider ultracold and dilute bosonic atoms confined
by double-well shaped potentials. By employing the two-
site Bose-Hubbard (BH) model as a theoretical tool, we
describe the behaviour of such a system both at zero
and at finite temperature.
The ground-state of the two-site BH Hamiltonian will be
studied by analyzing how the inter-atomic interaction
affects the quantum Fisher information, the coherence
visibility, and the entanglement entropy, by focusing, in
particular, on the emergence of the Schrödinger's cat like
state.
In the presence of the temperature, I will show that,
contrary to naive expectations, when the boson-boson
interaction is suitably chosen thermal effects can increase
the coherence visibility.
Finally, we consider ultracold dipolar bosonic atoms
trapped by triple-well potentials in the presence of
periodic boundary conditions. By diagonalizing
the three-mode extended BH Hamiltonian, we study the
ground-state of the system by characterizing it by
means of the entanglement entropy.
Primary author
Dr
Giovanni Mazzarella
(Università di Padova)
