# Asymmetric Two-dimensional Magnetic Lattices for Ultracold Atoms Trapping and Confinement - Quantum Physics

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Abstract: A new method to implement an asymmetrical two-dimensional magnetic lattice isproposed. The asymmetrical two-dimensional magnetic lattice can be created byperiodically distributing magnetic minima across the surface of magnetic thinfilm where the periodicity can be achieved by milling $n\times n$ square holeson the surface of the film. The quantum device is proposed for trapping andconfining ultracold atoms and quantum degenerate gases prepared in the lowmagnetic field seeking-state at low temperature, such as the Bose-EinsteinCondensate BEC and ultracold fermions. We present detailed analysis of theanalytical expressions and the numerical simulation procedure used to calculatethe external magnetic field. We also, describe the magnetic band gap structureexhibited by the asymmetric effect of the magnetic minima and show some of thepossible application. We analyze the effect of changing the characteristicparameters of the magnetic lattice, such as the separating periodicity lengthand the hole size along with the applications of the external magnetic biasfields to maintain and allocate a suitable non-zero magnetic local minima ateffective $z$-distance above the thin film surface. Suitable values are shownwhich keep the trapped ultracold atoms away from the thermal Majorana spin-flipand the surface Casimir-Polder effect.

Autor: A. Abdelrahman, P. Hannaford M. Vasiliev, K. Alameh

Fuente: https://arxiv.org/