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We have realized a two dimensional permanent magnetic lattice ofIoffe-Pritchard microtraps for ultracold atoms. The lattice is formed by asingle 300 nm magnetized layer of FePt, patterned using optical lithography.Our magnetic lattice consists of more than 15000 tightly confining microtrapswith a density of 1250 traps/mm$^2$. Simple analytical approximations for themagnetic fields produced by the lattice are used to derive relevant trapparameters. We load ultracold atoms into at least 30 lattice sites at adistance of approximately 10 $\mu$m from the film surface. The present resultis an important first step towards quantum information processing with neutralatoms in magnetic lattice potentials.

A lattice of microtraps for ultracold atoms based on patterned magnetic films