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Design of magnetic traps for neutral atoms with vortices in type-II superconducting microstructures

B. Zhang, R. Fermani, T. Müller, M. J. Lim, and R. Dumke
Phys. Rev. A 81, 063408 – Published 8 June 2010
Physics logo See Synopsis: Microtraps for ultracold atoms

Abstract

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.

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  • Received 24 March 2010

DOI:https://doi.org/10.1103/PhysRevA.81.063408

©2010 American Physical Society

Synopsis

Key Image

Microtraps for ultracold atoms

Published 6 July 2010

Superconductors could be useful for trapping ultracold atoms in microstructures to make miniature atomic clocks.

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Authors & Affiliations

B. Zhang1, R. Fermani1,2, T. Müller1,2, M. J. Lim1,3, and R. Dumke1,*

  • 1Division of Physics and Applied Physics, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
  • 2Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543
  • 3Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Road, New Jersey, USA

  • *rdumke@ntu.edu.sg

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Issue

Vol. 81, Iss. 6 — June 2010

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