Efficient 1-D Velocity Selection in Laser-Cooled Atom Clouds

  • S. H. Myrskog
  • J. K. Fox
  • A. M. Jofre
  • L. R. Segal
  • S. R. Mishra
  • A. M. Steinberg
Conference paper

Abstract

In this paper we demonstrate a “velocity-selection” technique which selects the lowest energy atoms from a laser-cooled cloud. The technique selects in one dimension, and confines the colder, selected atoms in a small auxiliary trap, spatially separated from hotter atoms. For one dimensional experiments, velocity selection can have an efficiency (defined as the fraction of the initial cloud which remains after selection) that varies as √U/kBT, where U defines a maximum energy and T is a cloud temperature, making it more efficient than 3D cooling methods such as evaporative cooling, which typically retains less than 1% of the atoms when cooling to 1% of the initial temperature [1]. The process of selection creates non-thermal distributions with a sharp cutoff in velocity, which can be important for experiments on effects such as tunneling [2] and quantum collisions [3].

Keywords

Coherence Rubidium Peaked 

References and links

  1. 1.
    W. Ketterle and N.J. Van Druten, “Evaporative cooling of trapped atoms”, in Adv. Atomic, Molecular and Optical Physics, 37, edited B. Bederson and H. Walther, (Academic Press. Cambridge, 1996)Google Scholar
  2. 2.
    A. M. Steinberg, S. Myrskog, Han Seb Moon, Hyun Ah Kim, Jalani Fox, Jung Bog Kim. Ann. Phys. (Leipzig) 7, 593 (1998)ADSCrossRefGoogle Scholar
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    S. Brouard and J.G. Muga, Phys. Rev. Lett. 81, 2621 (1998)ADSCrossRefGoogle Scholar
  4. 4.
    J.K. Fox, S.R. Mishra, S.H. Myrskog, A.M. Jofre, L.R. Segal and A.M. Steinberg, To be PublishedGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • S. H. Myrskog
    • 1
  • J. K. Fox
    • 1
  • A. M. Jofre
    • 1
  • L. R. Segal
    • 1
  • S. R. Mishra
    • 1
  • A. M. Steinberg
    • 1
  1. 1.Dept. of PhysicsUniversity of TorontoCanada

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