Magnetic guide and trap for cold neutral atoms with current-carrying wiresand conductors

We propose two novel schemes for guiding cold, neutral atoms using static m agnetic fields generated by several cylindrical arrays of current-carrying wires or a few different-shaped (V-, or U-shaped, etc.) current-carrying co nductors, and calculate the corresponding magnetic-field contours and their trapping potentials. Our study shows that some guiding schemes can be used to form an atomic funnel, or an atomic beam-splitter, or even construct an atomic interferometer, and some guiding schemes can be used to realize a s ingle-mode waveguide of ultracold atoms (or coherent matter waves, BEC) und er certain conditions. We also propose a few new schemes to microscopically trap neutral atoms by using various planar arrays of current-carrying wire s and calculate the spatial distribution of the magnetic fields. Our resear ch shows that these microtrap arrays can be used to form 1D, 2D or 3D atomi c magnetic lattices, and then to prepare ID, 2D or 3D photonic crystals, ev en to realize a 1D, 2D or 3D array of magnetically-trapped BECs or Bose Clu sters.