Collective excitation frequencies of a Bose - Einstein condensate with electromagnetically induced $1/r$ attraction
Abstract
Description
We investigate collective excitations of an atomic Bose-Einstein condensate in a recently discovered regime [D.O'Dell et al., Phys. Rev. Lett. 84, 5687 (2000)] of a balance between electromagnetically induced $1/r$ attraction and a short-range interatomic repulsion. The corresponding frequencies for monopole, dipole, and quadrupole modes are calculated numerically in the zero temperature case.
5 pages, Latex. The boundary conditions for the l=0 mode improved. The values of eigenfrequencies for the l=0 and l=2 modes corrected. The final sentences corrected
5 pages, Latex. The boundary conditions for the l=0 mode improved. The values of eigenfrequencies for the l=0 and l=2 modes corrected. The final sentences corrected