Adjustable microchip ring trap for cold atoms and molecules

We describe the design and function of a circular magnetic waveguide produced from wires on a microchip for atom interferometry using de Broglie waves. The guide is a two-dimensional magnetic minimum for trapping weak-field seeking states of atoms or molecules with a magnetic dipole moment. The desi...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2009-12, Vol.80 (6), Article 063615
Main Authors: Baker, Paul M., Stickney, James A., Squires, Matthew B., Scoville, James A., Carlson, Evan J., Buchwald, Walter R., Miller, Steven M.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ATOMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CURRENTS
DESIGN
DIPOLE MOMENTS
DISTURBANCES
GEOMETRY
INTERFEROMETERS
INTERFEROMETRY
MAGNETIC DIPOLE MOMENTS
MAGNETIC MOMENTS
MATHEMATICS
MEASURING INSTRUMENTS
MOLECULES
PERTURBATION THEORY
RADIATION PRESSURE
TIME DEPENDENCE
TRAPPING
TRAPS
WAVEGUIDES
WIRES
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Summary:We describe the design and function of a circular magnetic waveguide produced from wires on a microchip for atom interferometry using de Broglie waves. The guide is a two-dimensional magnetic minimum for trapping weak-field seeking states of atoms or molecules with a magnetic dipole moment. The design consists of seven circular wires sharing a common radius. We describe the design, the time-dependent currents of the wires and show that it is possible to form a circular waveguide with adjustable height and gradient while minimizing perturbation resulting from leads or wire crossings. This maximal area geometry is suited for rotation sensing with atom interferometry via the Sagnac effect using either cold atoms, molecules and Bose-condensed systems.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.80.063615