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, ω) and the latter to the one-particle spectral function A(q, ω).

Probing correlations of gaseous microwires in lattice potentials via inelastic light scattering / N. Fabbri. - In: IL NUOVO CIMENTO C. - ISSN 2037-4909. - STAMPA. - 34:(2011), pp. 75-84. (Intervento presentato al convegno XCVI National Congress of the Italian Physical Society tenutosi a Bologna nel 20-24/09/2010) [10.1393/ncc/i2011-10988-4].

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

FABBRI, NICOLE
2011

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, ω) and the latter to the one-particle spectral function A(q, ω).
2011
--
XCVI National Congress of the Italian Physical Society
Bologna
20-24/09/2010
N. Fabbri
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/851928
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