Pioneering Advances in Materials

Pioneering Advances in Materials

The Investigation of Permanent Magnetic Waveguide Lattice in Presence of 3D Bias Magnetic Field Components

Document Type : Original Article

Author
Parvin Karimi
Department of Physics, ST.C., Islamic Azad University, Tehran, Iran
10.48308/piadm.2026.245206.1027
Abstract
In this paper, we propose a permanent magnetic waveguide lattice produced by high quality magneto-optical film FePt for confining, controlling and manipulating ultracold atoms, quantum degenerate gases, and Bose–Einstein condensates (BECs). We also consider the components of an external bias magnetic field B1x , B1y and B1z to provide further control over the parameters of magnetic lattice. For the first time, we derive analytical expressions describing the dependence of the trap parameters, including the locations of the magnetic field minima, the curvatures of the absolute value of the magnetic field, trap frequencies, magnetic field barrier heights, and trap depths, on the value of external bias magnetic fields along the x, y, and z directions. Furthermore, numerical calculations are carried out for a magnetic lattice size ns=71 and the corresponding results are compared for two cases B1z=0 and B1z≠0 . The results demonstrate that considering B1z≠0 leads to deeper trapping potentials compared with the case of B1z=0.
Keywords
Magnetic lattice
Atom chip
Ultracold atoms
Magnetic microtraps
Permanent magnet films
Pioneering Advances in Materials
Volume 2, Issue 1
Winter 2026