Interacting laser and Bose-Einstein-condensate atomic beams: Mutual guiding structures
نویسندگان
چکیده
A basic set of equations describing the interaction of a Bose-Einstein condensate (BEC) with a laser field is derived based on a semiclassical model and applied to the problem of mutual guiding of laser and BEC atomic beams. Within this framework we have studied stationary spatially localized solutions of the nonlinear system which describe possible laser and BEC atomic beam guiding and have shown their stability as well. It is also shown that a self-guiding effect can be realized through both singleand multiple-scaled structures of a BEC atomic and a laser beam.
منابع مشابه
Periodically dressed Bose-Einstein condensate: a superfluid with an anisotropic and variable critical velocity.
We consider a two-component atomic gas illumined by two intersecting laser beams which induce Raman coupling between the components. This spatially periodic coupling modifies the dispersion relation of the gas. Properties of a Bose-Einstein condensate of such a gas are strongly affected by this modification. Using the quasiparticle excitation spectrum derived from a Bogoliubov transformation, t...
متن کاملPropagation of Raman-matched laser pulses through a Bose-Einstein condensate
We investigate the role of non-uniform spatial density profiles of trapped atomic Bose-Einstein condensates in the propagation of Raman-matched laser pulses under conditions for electromagnetically induced transparency (EIT). We find that the sharp edged axial density profile of an interacting condensate (due to a balance between external trap and repulsive atomic interaction) is advantageous f...
متن کاملAll-optical formation of an atomic Bose-Einstein condensate.
We have created a Bose-Einstein condensate (BEC) of 87Rb atoms directly in an optical trap. We employ a quasielectrostatic dipole force trap formed by two crossed CO2 laser beams. Loading directly from a sub-Doppler laser-cooled cloud of atoms results in initial phase space densities of approximately 1/200. Evaporatively cooling through the BEC transition is achieved by lowering the power in th...
متن کامل0 Collective excitation frequencies of a Bose – Einstein condensate with electromagnetically induced 1 / r attraction
We investigate collective excitations of an atomic Bose-Einstein con-densate 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 for a zero temperature case. T...
متن کاملAtom lasers and phase coherence of atomic Bose gases
Using continuous radio-frequency waves a coherent beam of atoms can be extracted from a magnetically trapped gaseous Bose-Einstein condensate. These novel atomic beams have matter-wave properties that are very similar to those of laser light in classical optics and are therefore called atom lasers. Furthermore, coupling out atoms from a Bose gas allows one to probe the dramatic changes in the p...
متن کامل