An optical speckle potential is used to investigate the static and dynamic properties of a Bose-Einstein condensate in the presence of disorder. With small levels of disorder, stripes are observed in the expanded density profile and strong damping of dipole and quadrupole oscillations is seen. Uncorrelated frequency shifts of the two modes are measured and are explained using a sum-rules approach and by the numerical solution of the Gross-Pitaevskii equation.
Bose-Einstein Condensate in a Random Potential / J. Lye; L. Fallani; M. Modugno; D. Wiersma; C. Fort; M. Inguscio. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 95:(2005), pp. 070401-070401. [10.1103/PhysRevLett.95.070401]
Bose-Einstein Condensate in a Random Potential
FALLANI, LEONARDO;MODUGNO, MICHELE;WIERSMA, DIEDERIK SYBOLT;FORT, CHIARA;INGUSCIO, MASSIMO
2005
Abstract
An optical speckle potential is used to investigate the static and dynamic properties of a Bose-Einstein condensate in the presence of disorder. With small levels of disorder, stripes are observed in the expanded density profile and strong damping of dipole and quadrupole oscillations is seen. Uncorrelated frequency shifts of the two modes are measured and are explained using a sum-rules approach and by the numerical solution of the Gross-Pitaevskii equation.
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