A two-dimensional permanent magnetic lattice for ultracold atoms

Abstract

We propose a new permanent magnetic lattice for creating periodic arrays of Ioffe-Pritchard permanent magnetic microtraps for holding and controlling ultracold atoms and Bose-Einstein condensates (BECs). Lattice can be designed on thin layer of magnetic films such as T b6Gd10F e80Co4. In details, we investigate single layer and two crossed layers of sawtooth magnetic patterns with thicknesses of 50 and 500nm respectively with a periodicity of 1µm. Trap depth and frequencies can be changed via an applied bias field to handle tunneling rates between lattice sites. We present analytical expressions and using numerical calculations show that this lattice has non-zero potential minima to avoid majorana spin flips. One advantage of this lattice over previous ones is that it is easier to manufacture.

3D permanent magnetic lattices for ultracold atoms

“…Periodic arrays of magnetic microtraps created by arrays of current-carrying wires [11,12] and permanent magnetic slabs [13][14][15][16][17][18][19][20] have been introduced for trapping and manipulating ultracold atoms. They have been used in fundamental researches on ultracold atoms including quantum degenerate gases and BECs [21].…”

“…Moreover, 2D lattices of magnetic microtraps produced by crossed arrays of current-carrying wires have been proposed [26,27]. So far, several configurations of permanent magnetic lattices have been proposed [13][14][15][16][17][18][19][20]. In reference [13], arrays of permanent magnetic waveguides and the first 2D permanent magnetic lattice consisting of arrays of either rectangular or square slabs has been proposed.…”

A comparison of trapping the rubidium atoms in optical and magnetic lattices

“…A nanoscale superconducting vortex lattice was studied as a magnetic lattice for trapping the ultracold atoms [28]. In [29] another permanent magneric lattice was introduced for confining and controlling ultracold atoms and BECs.…”