Mean-field approach to dipole-dipole interaction in an optical lattice
Year: 1999
Authors: Menotti C., Ritsch H.
Autors Affiliation: Scuola Normale Super Pisa, I-56126 Pisa, Italy; Univ Pisa, Dipartimento Fis, Unita INFM, I-56126 Pisa, Italy; Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
Abstract: We compare the influence of quantum statistics and atom-atom interaction in bright and dark one-dimensional optical lattices for atoms using quantum rate equations. Via a Hartree-Fock-type mean-field approach we derive an effective nonlinear single-atom equation and solve it self-consistently for a prescribed atomic density. Using a simplified dipole-dipole interaction potential, we show that the atomic energy bands are very sensitive to the mean atomic density, even in a parameter regime where temperature and band populations exhibit only a very small density dependence. Bright lattices show energy shifts towards smaller band separations, while the effect is in the opposite direction and smaller for dark lattices. In general, dipole-dipole interaction strongly dominates the influence of quantum statistics, except for very large detunings, where the spontaneous emission rate is very small. [S1050-2947(99)51610-7].
Journal/Review: PHYSICAL REVIEW A
Volume: 60 (4) Pages from: R2653 to: R2656
KeyWords: Nonlinear Atom Optics; Cold Cesium Atoms; Trapping Atoms; Spatial Order; Light; Equations; Molasses; Dynamics; MotionDOI: 10.1103/PhysRevA.60.R2653Citations: 7data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)