Journal
PHYSICAL REVIEW LETTERS
Volume 90, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.90.110402
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A gaseous Bose-Einstein condensate irradiated by a far off-resonance laser has long-range interatomic correlations caused by laser-induced dipole-dipole interactions. These correlations, which are tunable via the laser intensity and frequency, can produce a roton minimum in the excitation spectrum-behavior reminiscent of the strongly correlated superfluid liquid He II.
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