Programmable trap geometries with superconducting atom chips

Abstract

We employ the hysteretic behavior of a superconducting thin film in the remanent state to generate different traps and flexible magnetic potentials for ultra-cold atoms. The trap geometry can be programmed by externally applied fields. This new approach for atom-optics is demonstrated by three different trap types realized on a single micro-structure: a Z-type trap, a double trap and a bias field free trap. Our studies show that superconductors in the remanent state provide a new versatile platform for atom-optics and applications in ultra-cold quantum gases.

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• Sensitivity of ultracold atoms to quantized flux in a superconducting ring
• Reconfigurable self-sufficient traps for ultracold atoms based on a superconducting square
• Perspective on new implementations of atomtronic circuits
• Inductively coupled superconducting half wavelength resonators as persistent current traps for ultracold atoms
• Trapped electron coupled to superconducting devices
• Magnetic confinement of neutral atoms based on patterned vortex distributions in superconducting disks and rings
• Optically Tailored Trapping Geometries for Ultracold Atoms on a Type-II Superconducting Chip
• Single vortex fluctuations in a superconducting chip as generating dephasing and spin flips in cold atom traps
• Current-induced magnetization hysteresis defines atom trapping in a superconducting atomchip
• Trapping neutral atoms in the field of a vortex pinned by a superconducting nano-disc