A quantum point contact for neutral atoms

Details A quantum point contact for neutral atoms A quantum point contact for neutral atoms

1999-09-10

arxiv.org/abs/physics/9909020v1

Physics

Atomic Physics

5 pages with 3 figures. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.83.3762

We show that the conductance of neutral atoms through a tightly confining waveguide constriction is quantized in units of lambda_dB^2/pi, where lambda_dB is the de Broglie wavelength of the incident atoms. Such a constriction forms the atom analogue of an electron quantum point contact and is an example of quantum transport of neutral atoms in an aperiodic system. We present a practical constriction geometry that can be realized using a microfabricated magnetic waveguide, and discuss how a pair of such constrictions can be used to study the quantum statistics of weakly interacting gases in small traps.

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