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Accueil du site > Séminaires > LCFIO > Magnetic Lattices for Ultracold Atoms

Magnetic Lattices for Ultracold Atoms

Séminaire de Peter Hannaford

Vendredi 26 juin 2009 à 14h30, Laboratoire Charles Fabry, Institut d’optique, Campus polytechnique, Palaiseau

abstract
We will describe the use of periodic arrays of magnetic microtraps generated by microstructured magnetic films on an atom chip for trapping, controlling and manipulating small clouds of ultracold atoms and degenerate quantum gases. Such ‘magnetic lattices’ may be regarded as complementary to optical lattices in much the same way as magnetic traps are complementary to optical dipole traps. To be trapped in a magnetic lattice, the ultracold atoms need to be in low magnetic field-seeking states, thus allowing the use of radiofrequency evaporative cooling and radiofrequency spectroscopic techniques.

Magnetic lattices have very low technical noise, highly stable potentials and low heating rates and they can have large barrier heights and very high trap frequencies. In addition, magnetic lattices can be fabricated with a wide range of periods, down to about 1 m, they can be readily scaled up to have a very large number of lattice sites, for use, for example, as storage registers in quantum information, and they can be tailored to have complex potentials and homogeneous lattice potentials.

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