55 citations · 145 across the 5 of their papers we have counts for
6 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…
Cell strong coupling perturbative approach to the phase diagram of ultracold bosons in optical superlattices
Pierfrancesco Buonsante, Alessandro Vezzani
The phase diagram of ultracold bosons in realistic optical superlattices is addressed via second-order {\it cell} strong coupling perturbative expansions for the Bose-Hubbard model…
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…
Magnetization bound for classical spin models on graphs
Raffaella Burioni, Davide Cassi, Alessandro Vezzani
In this paper we prove the existence of phase transitions at finite temperature for O(n) classical ferromagnetic spin models on infrared finite graphs. Infrared finite graphs are i…