A Sawtooth Permanent Magnetic Lattice for Ultracold Atoms and BECs

Details A Sawtooth Permanent Magnetic Lattice for Ultracold Atoms and BECs A Sawtooth Permanent Magnetic Lattice for Ultracold Atoms and BECs

2011-01-28

arxiv.org/abs/1101.6068v1

Physics

Condensed Matter

Quantum Gases

8 pages, 6 figures

Scientific paper

We propose a new permanent magnetic lattice for creating periodic arrays of Ioffe-Pritchard permanent magnetic microtraps for holding and controlling ultracold atoms and Bose-Einstein condensates (BECs). Lattice can be designed on thin layer of magnetic films such as $Tb_6$$Gd_10$$Fe_{80}$$Co_4$. In details, we investigate single layer and two crossed layers of sawtooth magnetic patterns with thicknesses of 50 and 500nm respectively with a periodicity of 1$\mu$m. Trap depth and frequencies can be changed via an applied bias field to handle tunneling rates between lattice sites. We present analytical expressions and using numerical calculations show that this lattice has non-zero potential minima to avoid majorana spin flips. One advantage of this lattice over previous ones is that it is easier to manufacture.

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