We propose two double-well magnetic traps for cold neutral atoms that use current-carrying wires. These traps can be used to trap two different atomic species. The spatial distributions of the magnetic fields, gradients, and curvatures from these two wire configurations were calculated and analyzed. Our study shows that the double-well traps proposed here can be continuously changed into single-well traps by reduction of the current in a wire (or a coil) and vice versa and that a maximum field gradient greater than 5×10<sup>4</sup> G/cm and a maximum field curvature (at each trap center) greater than 2.5×10<sup>7</sup> G/cm<sup>2</sup> can be generated in our double-well traps and used to achieve two-species Bose–Einstein condensations and study the properties of double-well Bose–Einstein condensations or to achieve sympathetic cooling between two atomic samples or even to achieve two-species magneto-optical traps and study cold collisions between two atomic samples.
© 2002 Optical Society of America
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.7010) Atomic and molecular physics : Laser trapping
(020.7490) Atomic and molecular physics : Zeeman effect
(230.3990) Optical devices : Micro-optical devices
Jianjun Hu and Jianping Yin, "Controllable double-well magnetic traps for neutral atoms," J. Opt. Soc. Am. B 19, 2844-2851 (2002)