63 citations · 267 across the 6 of their papers we have counts for
6 papers
Negative Temperature States in the Discrete Nonlinear Schroedinger Equation
S. Iubini, R. Franzosi, R. Livi +2
We explore the statistical behavior of the discrete nonlinear Schroedinger equation. We find a parameter region where the system evolves towards a state characterized by a finite d…
Control of unstable macroscopic oscillations in the dynamics of three coupled Bose condensates
P. Buonsante, R. Franzosi, V. Penna
We study the dynamical stability of the macroscopic quantum oscillations characterizing a system of three coupled Bose-Einstein condensates arranged into an open-chain geometry. Th…
Dynamical Instability in a Trimeric Chain of Interacting Bose-Einstein Condensates
P. Buonsante, R. Franzosi, V. Penna
We analyze thoroughly the mean-field dynamics of a linear chain of three coupled Bose-Einstein condensates, where both the tunneling and the central-well relative depth are adjusta…
Quantum Dynamics of Coupled Bosonic Wells within the Bose-Hubbard Picture
R. Franzosi, V. Penna, R. Zecchina
We relate the quantum dynamics of the Bose-Hubbard model (BHM) to the semiclassical nonlinear equations that describe an array of interacting Bose condensates by implementing a sta…
Topology and phase transitions: a paradigmatic evidence
Roberto Franzosi, Marco Pettini, Lionel Spinelli
We report upon the numerical computation of the Euler characteristic χ(a topologic invariant) of the equipotential hypersurfaces Σ_v of the configuration space of the two-dimension…
Topological aspects of geometrical signatures of phase transitions
Roberto Franzosi, Lapo Casetti, Lionel Spinelli +1
Certain geometric properties of submanifolds of configuration space are numerically investigated for classical lattice phi^4 models in one and two dimensions. Peculiar behaviors of…