Efficient loading of a magnetic waveguide on an atom chip

Journal Article · Mon Aug 15 04:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.023612· OSTI ID:20718190

Schwindt, Peter D.D.; Cornell, Eric A; Kishimoto, Tetsuo; Yingju, Wang; Anderson, Dana Z ^[1]

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1. Department of Physics, University of Colorado (United States) and JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440 (United States)

We demonstrate efficient loading of neutral atoms into a magnetic waveguide produced by the magnetic fields of microfabricated current-carrying conductors. The lithographically patterned conductors on this 'atom chip' can be used to make a variety of guiding and trapping structures for manipulating cold atoms and Bose-Einstein condensates. A three-chamber vacuum apparatus collects atoms in a magneto-optical trap, precools them via evaporative cooling, and delivers them to the final chamber containing the atom chip. We describe in detail how the precooled atomic cloud is transferred from a macroscopic magnetic Ioffe-Pritchard trap to the microscopic magnetic waveguide on the atom chip 21 cm away. Permanent magnets provide a confining two-dimensional quadrupole field to guide the atoms between the two chambers while longitudinally the cloud is allowed to freely expand during the transfer. Strategically placed coils are used to control the longitudinal size and speed of the atomic cloud as it is loaded on the atom chip.

• OSTI ID: 20718190
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
CURRENTS
EVAPORATIVE COOLING
MAGNETIC FIELDS
MAGNETO-OPTICAL EFFECTS
OPTICS
PERMANENT MAGNETS
QUADRUPOLES
TRAPPING
TRAPS
TWO-DIMENSIONAL CALCULATIONS
WAVEGUIDES