title: Effect of optical disorder and single defects on the expansion of a Bose-Einstein condensate in a one-dimensional waveguide.
abstract: We investigate the one-dimensional expansion of a Bose-Einstein condensate in an optical guide in the presence of a random potential created with optical speckles. With the speckle the expansion of the condensate is strongly inhibited. A detailed investigation has been carried out varying the experimental conditions and checking the expansion when a single optical defect is present. The experimental results are in good agreement with numerical calculations based on the Gross-Pitaevskii equation.
authors.affiliation: LENS, Dipartimento di Fisica and INFM, Università di Firenze, via Nello Carrara 1, I-50019 Sesto Fiorentino (FI), Italy.
authors.forename: C
authors.initials: C
authors.lastname: Fort
authors.forename: L
authors.initials: L
authors.lastname: Fallani
authors.forename: V
authors.initials: V
authors.lastname: Guarrera
authors.forename: J E
authors.initials: JE
authors.lastname: Lye
authors.forename: M
authors.initials: M
authors.lastname: Modugno
authors.forename: D S
authors.initials: DS
authors.lastname: Wiersma
authors.forename: M
authors.initials: M
authors.lastname: Inguscio