Optical Confinement of a Bose-Einstein Condensate
نویسندگان
چکیده
Bose-Einstein condensates of sodium atoms have been confined in an optical dipole trap using a single focused infrared laser beam. This eliminates the restrictions of magnetic traps for further studies of atom lasers and Bose-Einstein condensates. More than 5 3 106 condensed atoms were transferred into the optical trap. Densities of up to 3 3 1015 cm23 of Bose condensed atoms were obtained, allowing for a measurement of the three-body loss rate constant for sodium condensates as K3 1.1 3 3 10230 cm6 s21. At lower densities, the observed 1 e lifetime was longer than 10 s. Simultaneous confinement of Bose-Einstein condensates in several hyperfine states was demonstrated. [S0031-9007(98)05537-9]
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