Bose-Einstein condensate in a random potential

Year: 2005

Authors: Lye J., Fallani L., Modugno M., Wiersma D., Fort C., Inguscio M.

Autors Affiliation: Univ Florence, Dipartimento Fis, LENS, I-50019 Sesto Fiorentino, FI, Italy;
Univ Florence, INFM, I-50019 Sesto Fiorentino, FI, Italy;
Univ Trent, BEC INFM Ctr, I-38050 Povo, TN, Italy;
INFM, MATIS, Catania, Italy

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.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 95      Pages from: 070401  to: 070401

KeyWords: superfluid-insulator transition; collective excitations; optical lattice; 2 dimensions; gas
DOI: 10.1103/PhysRevLett.95.070401

Citations: 334
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