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.
- Received 16 November 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.110402
©2003 American Physical Society