We discuss a technique to probe the properties of an interacting cold atomic gas that can be viewed as a dynamical compressibility measurement. We apply this technique to the study of the superfluid-to-Mott-insulator quantum phase transition in one and three dimensions for a bosonic gas trapped in an optical lattice. Excitations of the system are detected by time-of-flight measurements. The experimental data for the one-dimensional case are in good agreement with the results of a time-dependent density-matrix-renormalization-group calculation.
|Autori:||Lignier H; Zenesini A; Ciampini D; Morsch O; Arimondo E; Montangero S; Pupillo G; Fazio R|
|Titolo:||Trap-modulation spectroscopy of the Mott-insulator transition in optical lattices|
|Anno del prodotto:||2009|
|Digital Object Identifier (DOI):||10.1103/PhysRevA.79.041601|
|Appare nelle tipologie:||1.1 Articolo in rivista|