Probing correlations of gaseous microwires in lattice potentials via inelastic light scattering

Year: 2011

Authors: Fabbri N.

Autors Affiliation: LENS, Università di Firenze, Sesto Fiorentino (FI), Italy

Abstract: In this work, inelastic light-scattering (Bragg spectroscopy) is used to study strongly correlated phases of ultracold 1D gases in optical lattices. We investigate the crossover from correlated superfluids to Mott insulators. Light-scattering creates in the system elementary excitations with non-zero momentum, and the response of the correlated gases is in the linear regime. This allows for extracting information about the atomic many-body state in terms of its particle-hole excitations, as common in solid-state physics. In particular, we characterize the Mott state both via intra-band and inter-band spectroscopy, the former giving access to the dynamical structure factor S(q, omega) and the latter to the one-particle spectral function A(q, omega).

Conference title: XCVI National Congress of the Italian Physical Society

Volume: 34 (5)      Pages from: 75  to: 84

KeyWords: isolante di Mott
DOI: 10.1393/ncc/i2011-10988-4