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Waveguide atom beam splitter for laser-cooled neutral atoms.

D Müller, E A Cornell, M Prevedelli

|December 11, 2007

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Area of Science:

Atomic Physics
Quantum Control
Nanofabrication

Background:

Laser-cooled neutral atom beams are crucial for quantum technologies.
Precise manipulation of atom beams is essential for advanced applications.
Existing beam-splitting methods often lack efficiency or scalability.

Purpose of the Study:

To demonstrate a novel magnetic-field potential for splitting neutral atom beams.
To achieve efficient and controllable beam splitting with a 50/50 ratio.
To integrate beam guiding and splitting within a compact device.

Main Methods:

Utilized a low-velocity intense source of laser-cooled neutral atoms.
Generated a multimode beam-splitter potential using current-carrying wires on a glass substrate.
Applied an external transverse bias field to shape the magnetic potential.
Guided atoms through curves and a beam-splitter region within a 10-cm guide.

Main Results:

Achieved a maximum integrated flux of 1.5x10^5 atoms/s.
Employed a current density of 5x10^4 A/cm^2 in 100-microm-diameter wires.
Demonstrated the ability to split the initial atom beam into two beams.
Obtained a precise 50/50 splitting ratio.

Conclusions:

The developed magnetic-field potential effectively splits laser-cooled neutral atom beams.
This technique offers a scalable and controllable method for atom beam manipulation.
The integrated guiding and splitting system shows promise for future quantum devices.