2010/04/01 by B. Zhang, R. Fermani, Tobias M. Müller +4
Engineering · Physics and Astronomy · #Atom (system on chip) #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Current (fluid) #Engineering #Field (mathematics) #Magnetic field #Materials science #Mechanics #Mesoscopic physics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #Thermodynamics #Trapping #Type-II superconductor #Vortex #Vortex state #cond-mat.supr-con #physics.atom-ph
paper · pdf · doi:10.1103/physreva.81.063408
11 pages, 14 figures
arxiv created 2010/04/01 · openalex publication_date 2010/06/08 · arxiv updated 2015/05/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We design magnetic traps for atoms based on the average magnetic field of vortices induced in a type-II superconducting thin film. This magnetic field is the critical ingredient of the demonstrated vortex-based atom traps, which operate without transport current. We use Bean's critical-state method to model the vortex field through mesoscopic supercurrents induced in the thin strip. The resulting inhomogeneous magnetic fields are studied in detail and compared to those generated by multiple normally conducting wires with transport currents. Various vortex patterns can be obtained by programing different loading-field and transport-current sequences. These variable magnetic fields are employed to make versatile trapping potentials.