Optical focusing of Bose-Einstein condensates

Abstract

We theoretically investigate the optical focusing of a rubidium Bose-Einstein condensate onto a planar surface. Our analysis uses a Gaussian variational method that includes the effects of two-body atom-atom interactions and three-body recombination losses. The essential factors such as the width, peak density, and atom loss rate of the focused BEC profile on the surface are investigated and compared to Gross-Pitaevskii numerical simulations. We find a reasonable agreement in the results between our analytical approach and the numerical simulations. Our analysis predicts that condensates of 105 atoms could be focused down to ∼10 nm widths, potentially allowing nanometer-scale atomic deposition with peak densities greater than 105 atoms/μm2. Show more