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Applied Physics B

Manipulation of cold atoms by an adaptable magnetic reflector

P. Rosenbusch, B. V. Hall, Ifan G. Hughes, C. V. Saba, Edward A. Hinds

Published May 1, 2000• 24 citations
Publisher
DOI
10.1007/s003400050885

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This article outlines the basic physical principles of the magnetic atom reflector and summarizes the state of experiments performed by our group. I also discuss several new ideas for extending the magnetic reflector to confine atoms to a plane, a wire or a dot. These ideas aim at the general problem of controlling atomic motion for use in atom optics. The two–dimensional gas provides a new system in which to study quantum statistical properties such as Bose–Einstein condensation and other phase transitions. The confinement of cold atoms to wires and dots leads naturally towards the realization of a quantum computer.

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A corrugated magnetic reflector is realized by adding a bias field to a static magnetic mirror. This permits real-time manipulation of a cold-atom cloud on time scales down to 100 \ensuremath{\mu}s. We show that rotation of the bias field generates a traveling corrugation of adjustable depth and velocity. Momentum is transferred from the traveling wave to the atoms, resulting in a displacement of the cloud that depends on the wave velocity. This is a step towards a new method of manipulation in which neutral atoms could be transported across the surface by surfing along the moving wave.
This article outlines the basic physical principles of the magnetic atom reflector and summarizes the state of experiments performed by our group. I also discuss several new ideas for extending the magnetic reflector to confine atoms to a plane, a wire or a dot. These ideas aim at the general problem of controlling atomic motion for use in atom optics. The two–dimensional gas provides a new system in which to study quantum statistical properties such as Bose–Einstein condensation and other phase transitions. The confinement of cold atoms to wires and dots leads naturally towards the realization of a quantum computer.