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

Abstract

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

7 pages, 7 figures

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Cited by in corpus (5)

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• Fully permanent magnet atom chip for Bose-Einstein condensation
• Magnetic trapping of ultracold Rydberg atoms in low angular momentum states
• Dynamics of reflection of ultracold atoms from a periodic 1D magnetic lattice potential
• Reflection of OH molecules from magnetic mirrors