arXiv:cond-mat/0301028 · Physical Review Letters

Rotons in Gaseous Bose-Einstein Condensates Irradiated by a Laser

Duncan H J O’Dell, S. Giovanazzi, Gershon Kurizki

Published Mar 17, 2003• 188 citations

Abstract

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.

DOI: 10.1103/physrevlett.90.110402

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