Rotons in gaseous Bose-Einstein condensates irradiated by a laser

Details Rotons in gaseous Bose-Einstein condensates irradiated by a laser Rotons in gaseous Bose-Einstein condensates irradiated by a laser

2003-01-03

arxiv.org/abs/cond-mat/0301028v1

Phys. Rev. Lett 90, 110402 (2003)

Physics

Condensed Matter

Soft Condensed Matter

6 pages, includes 3 figures

Scientific paper

10.1103/PhysRevLett.90.110402

A gaseous Bose-Einstein condensate (BEC) 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 helium II.

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