New Regimes in Cold Gases via Laser-Induced Long-Range Interactions

The modification of the properties of a Bose-Einstein or a Fermi-Dirac atomic gas due to laser-induced dipole-dipole interactions between the atoms are considered. Nearly-isotropic illumination of the sample by spectrally-fluctuating laser beams averages out the static r−3 dipole-dipole interaction, leaving the retarded r−1 “selfgravitating” attraction in the near zone. The analogies of ultracold many-atom systems, self-bound by such …