Reduction of Magnetic Noise in Atom Chips by Material Optimization

Abstract

We discuss the contribution of the material type in metal wires to the electromagnetic fluctuations in magnetic microtraps close to the surface of an atom chip. We show that significant reduction of the magnetic noise can be achieved by replacing the pure noble metal wires with their dilute alloys. The alloy composition provides an additional degree of freedom which enables a controlled reduction of both magnetic noise and resistivity if the atom chip is cooled. In addition, we provide a careful re-analysis of the magnetically induced trap loss observed by Yu-Ju Lin et al. [Phys. Rev. Lett. 92, 050404 (2004)] and find good agreement with an improved theory.

25 pages with 9 figures eps

References in corpus (13)

• Bose-Einstein Condensation in a Surface Micro Trap
• Impact of the Casimir-Polder Potential and Johnson Noise on Bose-Einstein Condensate Stability near Surfaces
• Coherence in Microchip Traps
• Loss and heating of particles in small and noisy traps
• Thermally induced spin flips above an atom chip
• Bose-Einstein condensates near a microfabricated surface
• Surface Effects in Magnetic Microtraps
• Atom Chips: Fabrication and Thermal Properties
• Atomic spin decoherence near conducting and superconducting films
• Fundamental Limits for Coherent Manipulation on Atom Chips
• Coherent transport of matter waves
• Magnetostatic field noise near metallic surfaces
• Fluctuation, Dissipation, and Entanglement: the Classical and Quantum Theory of Thermal Magnetic Noise

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