55 citations · 140 across the 7 of their papers we have counts for
7 papers
Fractional-filling Mott domains in two dimensional optical superlattices
Pierfrancesco Buonsante, Vittorio Penna, Alessandro Vezzani
Ultracold bosons in optical superlattices are expected to exhibit fractional-filling insulating phases for sufficiently large repulsive interactions. On strictly 1D systems, the ex…
Analytical mean-field approach to the phase-diagram of ultracold bosons in optical superlattices
P. Buonsante, V. Penna, A. Vezzani
We report a multiple-site mean-field analysis of the zero-temperature phase diagram for ultracold bosons in realistic optical superlattices. The system of interacting bosons is des…
Fractional-filling loophole insulator domains for ultracold bosons in optical superlattices
Pierfrancesco Buonsante, Vittorio Penna, Alessandro Vezzani
The zero-temperature phase diagram of a Bose-Einstein condensate confined in realistic one-dimensional -periodic optical superlattices is investigated. The system of interact…
Strong-coupling expansions for the topologically inhomogeneous Bose-Hubbard model
P. Buonsante, V. Penna, A. Vezzani
We consider a Bose-Hubbard model with an arbitrary hopping term and provide the boundary of the insulating phase thereof in terms of third-order strong coupling perturbative expans…
Topology-induced confined superfluidity in inhomogeneous arrays
P. Buonsante, R. Burioni, D. Cassi +2
We report the first study of the zero-temperature phase diagram of the Bose-Hubbard model on topologically inhomogeneous arrays. We show that the usual Mott-insulator and superflui…
From the superfluid to the Mott regime and back: triggering a non-trivial dynamics in an array of coupled condensates
P Buonsante, R Franzosi, V Penna
We consider a system formed by an array of Bose-Einstein condensates trapped in a harmonic potential with a superimposed periodic optical potential. Starting from the boson field H…