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A gaseous Bose-Einstein condensate (BEC) irradiated by a far off-resonancelaser has long-range interatomic correlations caused by laser-induceddipole-dipole interactions. These correlations, which are tunable via the laserintensity and frequency, can produce a `roton' minimum in the excitationspectrum--behavior reminiscent of the strongly correlated superfluid liquidhelium II.Comment: 6 pages, includes 3 figure

Rotons in Gaseous Bose-Einstein Condensates Irradiated by a Laser