Effect of optical disorder and single defects on the expansion of a Bose-Einstein condensate in a one-dimensional waveguide.
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.
Fort
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LENS, Dipartimento di Fisica and INFM, Università di Firenze, via Nello Carrara 1, I-50019 Sesto Fiorentino (FI), Italy.
Fallani
L
L
Guarrera
V
V
Lye
J E
JE
Modugno
M
M
Wiersma
D S
DS
Inguscio
M
M