Abstract

Arrays of permanent magnetic slabs for producing 2D arrays of microtraps for trapping and controlling ultracold atoms have been introduced [1]. We propose a 2D array of square magnetic slabs which has been previously used to obtain analytical expressions for a class of permanent magnetic lattices [2].  We also, propose a more feasible magnetic lattice, consisting of the first configuration of square slabs plus a permanent magnetic substrate which holds the slabs together. In both configurations, we consider a bias magnetic field. To create Ioffe-Pritchard microtraps, the two non-zero components of the bias field in the magnetic film plane must have different values. Our analytical expressions and numerical results for different atoms are in very good agreement. The second pattern of the array of the square magnets may be fabricated using laser carving on a permanent magnetic film. References [1] S. Ghanbari, T. D. Kieu, A. Sidorov and P. Hannaford, Permanent magnetic lattices for ultracold atoms and quantum degenrate gases, J. Phys. B: At. Mol. Opt. Phys. 39, pp. 847-860 (2006). [2] S. Ghanbari, T. D. Kieu, and P. Hannaford, A class of permanent magnetic lattices for ultracold atoms, J. Phys. B: At. Mol. Opt. Phys. 40, pp. 1283-1294 (2007).