Phys. Rev. Lett. 89, 070401 (2002) [4 pages]Quantum Tweezer for AtomsReceived 31 January 2002; published 26 July 2002 We propose a quantum tweezer for extracting a desired number of neutral atoms from a reservoir. A trapped Bose-Einstein condensate is used as the reservoir, taking advantage of its coherent nature, which can guarantee a constant outcome. The tweezer is an attractive quantum dot, which may be generated by red-detuned laser light. By moving at certain speeds, the dot can extract a desired number of atoms from the condensate through Landau-Zener tunneling. The feasibility of our quantum tweezer is demonstrated through realistic and extensive model calculations. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.070401
DOI:
10.1103/PhysRevLett.89.070401
PACS:
03.75.–b
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